Cities in Flight

From Author Wars - https://authorwars.com/publications/cities-in-flight-236377.html

Overview:

Title: Cities in Flight
Author: James Blish
Year: Unknown
Publisher: Avon
Price: $2.25
Pages: 605
Binding: Paperback
Type: Omnibus
Title Reference: The Triumph of Time
Notes: 6th printing of Avon edition. Price obliterated. Cover is like this except Avon info is on right at top.