Outpost of Jupiter by Lester Del Rey

Outpost of Jupiter Mass Market Paperbound Lester Del Rey

Outpost of Jupiter - Paperback, by Del Rey Lester - Acceptable

Outpost of Jupiter by Lester Del Rey (Del Rey paperback 1978)

The Mysterious Planet by Lester Del Rey 1978 First Ballantine Edition

THE MYSTERIOUS PLANET by Lester Del Rey, Ballantine 1978 PB

The Best of Lester Del Rey By Frederik Pohl Ballantine Science Fiction 1976

Outpost of Jupiter Ballantine Del Rey, Lester VG Science Fiction Vintage 1978