Tweety and Sylvester (Rosnock Publications, 1970) has been grouped as part of a series of titles with continued numbering.
From December 1965, Magazine Management comics were published as one-shot issues with 'catalog numbers' on the cover, rather than separate titles in sequentially numbered series.
Magman's Standard 28 page comics ran through several series restarting at '01' or '001':
1965-1966 series: 15 and 16 prefixes.
1967 series: 17 prefix.
1968 series: 18 prefix.
1969 series: 19 prefix.
1970 series: 20 prefix.
1971 series: 21 prefix.
1972 series: 22 prefix.
1973 series: 23 prefix.
1974-1975 series: 24 and 25 prefixes.
1976 series: 26 prefix.
1978 series: 28 prefix.
1979-1984 series: 29, R12, R13 and R14 prefixes.
1985 series: R15 prefix.
The codes provide a guide to the year of publication, although some issues appear to have been released in December the previous year.
There appears to have been no comics published with codes for 1977, 1980 and 1981. A similar 28 page Top Comics series used 3 as the prefix.
Magman published distinct runs of catalog numbers for Standard, Top Comics, Pocket 'Picture Stories', Pocket Romance, Giant/Jumbo and Rebound editions.
Series
1.
Sad Sack
Rosnock Publications
#20-02 (1970)
2.
Little Lotta
Magazine Management
#20-03 ([1970])
3.
The Lone Ranger
Magazine Management
#20-04 ([1970])
4.
Casper the Friendly Ghost
Magazine Management
#20-05 ([1970])
5.
Hot Stuff the Little Devil
Magazine Management
#20-06 ([January 1970])
6.
Hanna-Barbera's Top Cat
Magazine Management
#20-07 (1970?)
7.
M-G-M's Tom and Jerry Comics
Magazine Management
#20-08 (1970)
8.
Richie Rich's Funtime Comics
Magazine Management
#20-09 ([February 1970])
9.
Walter Lantz Woody Woodpecker
Rosnock Publications
#20-10 (1970)
10.
Spooky the Tuff Little Ghost
Rosnock Publications
#20-11 ([February 1970])
11.
Hanna-Barbera's Yogi Bear
Magazine Management
#20-12 ([1970])
12.
Edgar Rice Burroughs' Tarzan
Magazine Management
#20-13 ([February 1970])
13.
Bugs Bunny
Magazine Management
#20-15 ([1970])
14.
Tweety and Sylvester
Rosnock Publications
#20-16 ([March 1970])
15.
Hanna-Barbera's Huckleberry Hound
Magazine Management
#20-17 (1970)
16.
Casper the Friendly Ghost
Rosnock Publications
#20-18 (March 1970)
17.
Hanna-Barbera's Pixie and Dixie
Magazine Management
#20-20 ([1970])
18.
M-G-M's Tom and Jerry Comics
Magazine Management
#20-21 (1970)
19.
Richie Rich's Funtime Comics
Magazine Management
#20-22 ([1970])
20.
Hanna-Barbera's the Jetsons
Magazine Management
#20-23 ([1970?])
21.
The Man from U.N.C.L.E.
Rosnock Publications
#20-24 ([April 1970])
22.
Spooky the Tuff Little Ghost
Magazine Management
#20-25 ([1970])
23.
Bugs Bunny
Magazine Management
#20-26 ([1970])
24.
Hanna-Barbera's The Flintstones
Rosnock Publications
#20-27 (1970)
25.
Hanna-Barbera's Top Cat
Rosnock Publications
#20-28 ([April 1970])
26.
Walter Lantz Woody Woodpecker
Rosnock Publications
#20-29 (1970)
27.
Casper the Friendly Ghost
Rosnock Publications
#20-30 (1970)
28.
Skippy the Bush Kangaroo
Junior Readers Press
#1 (#20-31) (1970)
29.
Hanna-Barbera's Yogi Bear
Rosnock Publications
#20-32 ([May 1970])
30.
Edgar Rice Burroughs' Tarzan
Rosnock Publications
#20-33 ([May 1970])
31.
M-G-M's Tom and Jerry Comics
Rosnock Publications
#20-34 ([1970])
32.
The Girl from U.N.C.L.E.
Magazine Management
#20-35 ([May 1970])
33.
Tweety and Sylvester
Rosnock Publications
#20-36 (1970)
34.
Richie Rich's Funtime Comics
Rosnock Publications
#20-37 ([June 1970])
35.
Daffy Duck
Rosnock Publications
#20-38 (1970)
36.
Wendy the Good Little Witch
Rosnock Publications
#20-39 (1970)
37.
Voyage to the Bottom of the Sea
Rosnock Publications
#20-40 (1970)
38.
Bugs Bunny
Magazine Management
#20-43 ([1970])
39.
Skippy the Bush Kangaroo
Junior Readers Press
#20-44 ([July 1970])
40.
Hot Stuff the Little Devil
Rosnock Publications
#20-45 ([1970])
41.
The Jetsons
Rosnock Publications
#20-46 ([1970])
42.
Casper the Friendly Ghost
Magazine Management
#20-47 ([1970])
43.
The Man from U.N.C.L.E.
Rosnock Pty. Ltd.
#20-48 (1970)
44.
Edgar Rice Burroughs' Korak Son of Tarzan
Magazine Management
#20-49 ([July 1970])
45.
Hanna-Barbera's Top Cat
Rosnock Publications
#20-50 (1970)
46.
Richie Rich's Funtime Comics
Rosnock Publications
#20-53 ([1970])
47.
Hanna-Barbera's Yogi Bear
Magazine Management
#20-54 ([1970])
48.
Edgar Rice Burroughs' Tarzan
Rosnock Publications
#20-55 ([August 1970])
49.
Space Family Robinson Lost in Space
Rosnock Publications
#20-56 (1970)
50.
Skippy the Bush Kangaroo
Junior Readers Press
#20-57 (1970)
51.
Bugs Bunny
Magazine Management
#20-59 ([1970])
52.
Ripley's Believe It or Not! True Demons and Monsters
Magazine Management
#20-60 ([1970])
53.
Tweety and Sylvester
Magazine Management
#20-61 ([1970])
54.
Hanna-Barbera's Huckleberry Hound
Magazine Management
#20-62 ([1970])
55.
Casper
Magazine Management
#20-63 ([1970])
56.
Voyage to the Bottom of the Sea
Rosnock Publications
#20-64 ([September 1970])
57.
M-G-M's Tom and Jerry Comics
Magazine Management
#20-67 ([1970])
58.
The Jetsons
Magazine Management
#20-68 (1970)
59.
Edgar Rice Burroughs' Korak Son of Tarzan
Rosnock Publications
#20-69 ([October 1970])
60.
Richie Rich's Funtime Comics
Magazine Management
#20-70 ([1970])
61.
Top Cat
Magazine Management
#20-71 (1970)
62.
The Man from U.N.C.L.E.
Rosnock Publications
#20-73 ([1970])
63.
Hanna-Barbera's The Flintstones
Magazine Management
#20-74 ([1970])
64.
Bugs Bunny
Magazine Management
#20-75 ([1970])
65.
Beep Beep the Road Runner
Rosnock Publications
#20-76 (1970)
66.
Walter Lantz Woody Woodpecker
Magazine Management
#20-77 ([1970])
67.
Casper the Friendly Ghost
Rosnock Publications
#20-78 ([1970])
68.
Skippy the Bush Kangaroo
Junior Readers Press
#4 (#20-80) (November 1970)
69.
The Girl from U.N.C.L.E.
Rosnock Publications
#20-81 ([1970])
70.
Edgar Rice Burroughs' Tarzan
Rosnock Publications
#20-82 ([November 1970])
71.
M-G-M's Tom and Jerry Comics
Rosnock Publications
#20-83 (1970)
72.
Tweety and Sylvester
Magazine Management
#20-84 ([1970])
73.
Richie Rich's Funtime Comics
Magazine Management
#20-85 ([1970])
74.
The Lone Ranger
Magazine Management
#20-86 ([1970])
75.
Ripley's Believe It or Not! True War Stories
Magazine Management
#20-87 ([1970])
76.
Daffy Duck
Magazine Management
#20-88 ([1970])
77.
Spooky the Tuff Little Ghost
Magazine Management
#20-89 (December 1970)
78.
Voyage to the Bottom of the Sea
Rosnock Publications
#20-90 ([December 1970])