Future Science Fiction: September 1952
Future Science Fiction: November 1951 (UK edition)
Fantastic Science Fiction: Febuary 1958
Planet Stories: November 1953
For more covers like these check out these sites:
The Pulp Zone A useful overview
Fantastic Collectibles The biggest collection I've seen
Pulp Magazines More good stuff
SF digest magazines This site in Japanese!
Famous Brassieres of SF Calendar A scholarly effort
Waystation Central Includes a strong page of links