Vertex: The Magazine of Science Fiction, February 1974
From Author Wars - https://authorwars.com/books/vertex-the-magazine-of-science-fiction-february-1974-151227.html
Overview:
Editions/Publications:
- Unknown. Vertex: The Magazine of Science Fiction, February 1974 (Unknown, Don Davis, Mankind Publishing Company, $1.50, 100 pages, quarto, MAGAZINE)