Nonfiction SF Books of Note in 1986

From Author Wars - https://authorwars.com/books/nonfiction-sf-books-of-note-in-1986-463421.html

Overview:

Title: Nonfiction SF Books of Note in 1986
Author: Doug Fratz
Year: 1987
Type: Essays

Editions/Publications:

Unknown. Thrust, #27, Summer 1987 (Unknown, Doug Fratz, Thrust Publications, $2.50, 32 pages, quarto, FANZINE)