Orphans of the Sky

From Author Wars - https://authorwars.com/publications/orphans-of-the-sky-172321.html

Overview:

Title: Orphans of the Sky
Author: Robert A. Heinlein
Year: 1967
Publisher: Signet / New American Library
Price: $0.60
Pages: 128
Binding: Paperback
Type: Novel
Title Reference: Orphans of the Sky
Notes:
• "Third Printing"; no date, no number line.
• Date from the printing history in the seventh printing, but there is an identical Canadian printing with a date of December 1967
• Since it is unlikely the Canadian printing was before the US one [both covers printed in the US] that date is used here
• "Front cover photo by Sidney Kramer" on the back cover
• Printed in the US