If vol 9 no 4, September 1959. Cover art by John Pederson, Jr. titled “Basic Research in Heat.”
Worlds of If, July 1965. Cover by McKenna.
Worlds of If, July 1967. Cover by Jack Gaughan.
If vol 19 no 5, May 1969. Cover by Johnny Bruck illustrating “Groovyland” by Robert Bloch.
If vol 17 no 8, August 1967. Cover by Gray Morrow illustrating “Faust Aleph-Null” by James Blish.
If vol 16 no 2, February 1966. Cover by John Pederson Jr illustrating “Prisoners of the Sky” by C. C. MacApp.
Worlds of If, December 1966. Cover by Jack Gaughan.
If vol 21 no 6, July-August 1972. Cover by Jack Gaughan illustrating “The Book of Rack the Healer” by Zach Hughes.
If vol 2 no 6, January 1954. Cover art by Ken Fagg titled “An Undersea Civilization.”
If vol 3 no 4, June 1954. Cover art by Ken Fagg titled “Lava Falls on Mercury.”
Worlds of If, September 1963. Cover by Paul E. Wenzel.
If vol 5 no 5, August 1955. Cover art by Kenneth Rossi illustrating “Bleedback” by Winston Marks.
Worlds of If, January 1969. Cover by Douglas Chaffee.
Worlds of If, August 1967. Cover by Gray Morrow.
Worlds of If, September 1966. Cover by Gray Morrow.
Worlds of If, September 1967. Cover by Gray Morrow.
Worlds of If, March 1963. Cover by Virgil Finlay.