The Day Before Forever and Thunderhead

From Author Wars - https://authorwars.com/publications/the-day-before-forever-and-thunderhead-165751.html

Overview:

Title: The Day Before Forever and Thunderhead
Author: Keith Laumer
Year: 1969
Publisher: Dell
Price: $0.50
Pages: 157
Binding: Paperback
Type: Collection
Title Reference: The Day Before Forever and Thunderhead
Notes:
"Copyright © 1968 by Keith Laumer" "Copyright © 1967 by Galaxy Publishing Corporation" "Copyright © 1967 by Mercury Press, Inc." "Published by DELL PUBLISHING CO., INC." "Reprinted by arrangement with Doubleday and Company. Inc." "First Dell printing—February 1969"; no number line "Cover: Berkey" on back cover, the artwork is also signed Printed in the US