Cities in Flight

From Author Wars - https://authorwars.com/publications/cities-in-flight-287430.html

Overview:

Title: Cities in Flight
Author: James Blish
Year: Unknown
Publisher: Avon
Price: $1.25
Pages: 605
Binding: Paperback
Type: Omnibus
Title Reference: The Triumph of Time
Notes: Undated. Stated 4th printing of February 1970 Avon edition
Artist not credited, no signature visible
Front cover identical to the first printing. Numbers on the spine read 380-00187-125