World of Ptavvs by Larry Niven Del Rey Paperback Book 1981

Star Surgeon by James White 1981 Del Rey Paperback

The Breaking of Northwall by Paul O. Williams ( Del Rey | 2nd. Printing | 1981 )

SECTOR GENERAL by James White - Vintage Science Fiction Paperback 1983 Del Rey

Iceworld by Hal Clement Vintage Paperback Ballantine 2nd Printing 1981 EX

Major Operation by James White 1981 Ballantine Del Rey Paperback

Major Operation ~ James White ~ 1981 Del Rey PB 3PR

Inherit the Stars by James P. Hogan 1981 Vintage Dely Rey Paperback