Seetee Ship / Seetee Shock

From Author Wars - https://authorwars.com/publications/seetee-ship--seetee-shock-29551.html

Overview:

Title: Seetee Ship / Seetee Shock
Author: Jack Williamson
Year: 1972
Publisher: Lancer Books
Price: $1.25
Pages: 222+223
Binding: Paperback
Type: Omnibus
Title Reference: Seetee Ship
Notes:
- No statement of printing on copyright page
- Each book is individually paginated.
- The front cover reproduces the original Jeff Jones cover for Lancer's first printing of Seetee Ship and the back reproduces his cover for Lancer's first printing of Seetee Shock.
- Not dated. Month of publication from William J. Denholm III's Lancer Checklist (Megavore #10, 1980). Contento says 1971 (with no month), but we view Denholm's date as more authoritative.