1973 Feb ANALOG SCIENCE FICTION & FACT Poul Anderson SPIDER ROBINSON Tak Hallus

1973 Mar ANALOG SCIENCE FICTION & FACT John Brunner POUL ANDERSON Herbie Brennan

Analog Science Fiction Science Fact Magazine March 1973 Poul Anderson

Analog Science Fact & Fiction December 1960 Poul Anderson

Analog Science Fiction Science Fact Apr 1973 Poul Anderson, Pat De Graw

February 1973 Analog magazine science fiction Poul Anderson

Analog Science Fact & Fiction March 1961 Poul Anderson

Vintage Original Analog Science Fiction & Fact October 1968 Poul Anderson