Black Hole Mines in the Asteroid Belt

From Author Wars - https://authorwars.com/books/black-hole-mines-in-the-asteroid-belt-123751.html

Overview:

Title: Black Hole Mines in the Asteroid Belt
Author: Jerry Pournelle
Year: 1973
Type: Essays

Editions/Publications:

Unknown. Vertex: The Magazine of Science Fiction, August 1973 (Unknown, Jerry Pournelle, Mankind Publishing Company, $1.50, 100 pages, quarto, MAGAZINE)