Magellan by Colin Anderson, date and cover artist unknown.
Galaxy Science Fiction, vol 6 no 1, April 1953. Cover by Alex Schomburg.
Thrilling Wonder Stories, vol XXXIII no 1, October 1948. Cover by Earle Bergey.
Thrilling Wonder Stories, vol XXX no 1, October 1947. Cover by Earle Bergey.
Endless Shadow by John Brunner, Ace Double F-299, 1964. Cover by Ed Valigursky.
The Time Bridge by Vargo Statten (alias of John Russell Fearn). Cover by Ron Turner, 1952.
Amazing Stories, vol 21, no 5, May 1947. Cover by James Teason.
Dangerous Frontiers by Steven Caldwell. Not in ISFDB!
Fantastic Adventures, vol 8 no 1, February 1946. Cover by Walter Parke illustrating “Toka and the Man Bats.”