Our Vanishing Triceratops

From Author Wars - https://authorwars.com/books/our-vanishing-triceratops-64689.html

Overview:

Title: Our Vanishing Triceratops
Author: Joe Pumilia Steven Utley
Year: 1977
Type: Short Fiction

Editions/Publications:

Unknown. Amazing Stories, March 1977 (Unknown, Joe Pumilia, Ultimate Publishing Co., Inc., $1.00, 134 pages, digest, MAGAZINE)
Unknown. Amazing Stories, March 1977 (Unknown, Steven Utley, Ultimate Publishing Co., Inc., $1.00, 134 pages, digest, MAGAZINE)