1946 Sheridan House, New York
1946
See this “Rarest Copy of Showdown” link!
1946 Invincible, Sydney
1946 “First Australian Edition”
1949 Dell Books
1952 W. Foulsham, London
1960 Cardinal, New York
1961 Consul Books
1976 Buccaneer Books
1986 Amereon Ltd
— Tim
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