The signature on the cover is that of Robert Gibson Jones, who was a pulp artist. Both this credit and the issue editing by Jerry Siegel, is confirmed in a news item in Fantasy Times 114 (1950-09-02)
On the inside front cover. Signature noted by Ger Apeldoorn via the GCD Error Tracker.
Writer ID determined by textual analysis by Lou Mougin.
United Nations; Atlantis; flying saucers
Letterer credit comes from reprint in Doc Weird's Thrill Book. [MN 3/2008]
Signature noted by Ger Apeldoorn via the GCD Error Tracker.