The Mysterious Planet by Lester Del Rey 1978 First Ballantine Edition

Attack from Atlantis by Lester del Rey-Ballantine Books Paperback-1982

The Mysterious Planet - Paperback, by Del Rey Lester - Acceptable

DILVISH, THE DAMNED BY ROGER ZELAZNY PAPERBACK DEL REY BOOKS 1982

Bedlam Planet by John Brunner 1982, Mass Market Del Rey Books Paperback Sci-fi

The Mysterious Planet Lester del Rey 1982 Third Printing Science Fiction PB SF

The Mysterious Planet by lester del rey vintage sci fi 1978

del Rey, Lester - The Mysterious Planet PB 1982 Very Good-