Magazine, Analog Science Fiction, Science Fact, February 1963

Analog Science Fiction / Science Fact January 1973 Good+

Analog Science Fiction / Science Fact Octoberber 1973 Good

Analog Science Fiction / Science Fact December 1973 Good

Analog Science Fiction/Science Fact Vol. 92 #1 VF- 7.5 1973

Analog Science Fiction/Science Fact Vol. 90 #6 FN/VF 7.0 1973

Analog Science Fiction/Science Fact Vol. 91 #4 FN- 5.5 1973 Low Grade

Analog Science Fiction/Science Fact Vol. 92 #4 FN 1973 Stock Image