Expedition to Earth

From Author Wars - https://authorwars.com/publications/expedition-to-earth-12832.html

Overview:

Title: Expedition to Earth
Author: Arthur C. Clarke
Year: 1969
Publisher: Ballantine Books
Price: $0.75
Pages: 165+[2]
Binding: Paperback
Type: Collection
Title Reference: The Sentinel
Notes:
"Fourth Printing: March, 1969"; no number line Copyright page also lists the first three printings and one CDN printing, all with dates The artist is not credited, no visible signature on the artwork [Vincent di Fate?] Printed in the US