EARTHMAN'S BURDEN by POUL ANDERSON & GORDON R. DICKSON 1979 SF Paperback SIGNED!

ATTACK FROM ATLANTIS by Lester Del Rey *1982 Del Rey Paperback 2nd Print* VG

1982 MISSION TO UNIVERSE by Gordon R Dickson VG/FN 5.0 2nd Del Rey Paperback

Mission To Universe Gordon R Dickson 2nd Print 1982 Del Rey Ballantine Books

Vintage 1965- Mission To Universe by Gordon Dickson – paperback - Acceptable

1982 UNDERSEA QUEST by Frederik Pohl VG+ 4.5 4th Del Rey Paperback

Gordon R. Dickson - Mission to Universe - 1982 - paperback

1984 MASTER OF THE FIVE MAGICS by Lyndon Hardy VG+ 4.5 5th Del Rey Paperback