Analog Science Fiction / Science Fact September 1970 Very Good-

Analog Science Fiction / Science Fact June 1970 Very Good

Analog Science Fiction / Science Fact March 1970 Very Good-

Analog Science Fiction / Science Fact August 1970 Very Good

Analog Science Fiction / Science Fact November 1970 Very Good+

Analog Science Fiction/Science Fact Vol. 86 #1 VG 1970 Low Grade

Analog Science Fiction / Science Fact December 1983 Very Good

Analog Science Fiction / Science Fact December 1990 Very Good-