Pellucidar

From Author Wars - https://authorwars.com/publications/pellucidar-209049.html

Overview:

Title: Pellucidar
Author: Edgar Rice Burroughs
Year: 1972
Publisher: Ace Books
Price: $0.75
Pages: 191
Binding: Paperback
Type: Novel
Title Reference: Pellucidar
Notes: Cover not credited but is listed as Frazetta at http://www.erbzine.com/mag7/0742.html#bb and is his style. Second Ace printing.