Analog Science Fiction / Science Fact June 1981 Very Good-

Analog Science Fiction / Science Fact December 1981 Good+

Analog Science Fiction / Science Fact November 1981 Good+

Analog Science Fiction / Science Fact July 1981 Very Good+

Analog Science Fiction / Science Fact August 1981 Very Good+

Analog Science Fiction / Science Fact April 1981 Very Good+

Analog Science Fiction / Science Fact March 2, 1981 Very Good+

Analog Science Fiction/Science Fact Vol. 101 #6 VF 1981