Cities in Flight

From Author Wars - https://authorwars.com/publications/cities-in-flight-884424.html

Overview:

Title: Cities in Flight
Author: James Blish
Year: 1975
ISBN-10: 0380009986
Publisher: Avon
Price: $2.25
Pages: 605+[2]
Binding: Paperback
Type: Omnibus
Title Reference: The Triumph of Time
Notes:
"First Avon Printing, February, 1970" "Sixth Printing" on the copyright page. No printer's key. Date from code 12-75 on the SFHF ad on the last physical page. Cover artist not credited, no visible signature. 27987 on the cover, 390-27987 on the spine