Twin Earths (Atlas Publications Pty. Ltd., 1957? series) has been grouped as part of a series of related titles with ongoing title/feature.

Series

1. Twin Earths New Century Press Pty. Ltd. #1 (1954?) to #29 (1956?)

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2. Twin Earths Atlas Publications Pty. Ltd. #11? (1957?) to #13? (1958?)

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3. Twin Earths Page Publications Pty. Ltd. #13 (1966?) to #15 (1970?)

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