War of the Wing-Men

From Author Wars - https://authorwars.com/publications/war-of-the-wing-men-202313.html

Overview:

Title: War of the Wing-Men
Author: Poul Anderson
Year: 1976
Publisher: Ace Books
Price: $1.50
Pages: 160
Binding: Paperback
Type: Novel
Title Reference: War of the Wing-Men
Notes:
- Printing history: First Ace Printing: August 1958 Second Ace Printing: May 1967 Third Ace Printing: November 1973 Fourth Ace Printing: August 1976
- Third printing as an Ace single. The first printing was as ½ of an Ace double.
- The front cover has "ACE|87202|$1.50" while the spine has 441 87202 150.
- The cover artist is not credited, a signature 'JHB' is visible on the rock under the alien's foot.