Prelude to Mars

From Author Wars - https://authorwars.com/publications/prelude-to-mars-26580.html

Overview:

Title: Prelude to Mars
Author: Arthur C. Clarke
Year: 1965
Publisher: Harcourt, Brace & World
Price: $4.95
Pages: x+497
Binding: Hardcover
Type: Omnibus
Title Reference: Prelude to Space
Notes:
- Stated first edition. Gutter code for the first printing is on p. 497, and is '19G', indicating a print date of the second week of May 1965. As is normal, we expect the publication date to be the print date plus one month.