The Mysterious Planet by Lester Del Rey 1978 First Ballantine Edition

THE MYSTERIOUS PLANET by Lester Del Rey (Del Rey PB Printing 1978) Sci-Fi

THE MYSTERIOUS PLANET by Lester Del Rey - 1978 Ballantine PB, 2nd Printing

The Mysterious Planet by Lester Del Rey 1978 Ballantine Paperback Sci Fi

The Mysterious Planet by Lester Del Rey (Del Rey Book 1978)

The Mysterious Planet by lester del rey vintage sci fi 1978

DAY OF THE GIANTS by Lester Del Rey 1964 Airmont FIRST PRINTING PB