Secret Agent X-9 (Photo-Type Press Pty. Ltd., 1964? series) has been grouped as part of a series of titles with continued numbering.

Series

1. Secret Agent X-9 Photo-Type Press Pty. Ltd. #15 (1964?) to #21 (1966?)

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2. Secret Agent X-9 Page Publications Pty. Ltd. #22? (1966?) to #27 (1969?)

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