Black holes
From Author Wars - https://authorwars.com/books/black-holes-3171256.html
Overview:
- Title: Black holes
- Author: Jaap Verburg
- Year: 1974
- Type: Essays
Editions/Publications:
- Unknown. Holland-SF 1974, #6 (Unknown, Jaap Verburg, NCSF, 34 pages, A4, FANZINE)