Secret Agent X9 (Atlas Publications Pty. Ltd., 1948? series) has been grouped as part of a series of titles with continued numbering.

The exact issue where the publisher changes from Photo-Type to Page is unknown.

Series

1. Secret Agent X9 Atlas Publications Pty. Ltd. #1 (1948?) to #9 (1950?)

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2. Phil Corrigan Secret Agent X9 Atlas Publications Pty. Ltd. #10 (1950) to #31 (1956)

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