by Paul Kurtz
publisher: Horizon Press publish date: October 1st 1974
format: paperback pages: 216
language: English
ISBN:
0818013206 (9780818013201)
publisher: Prometheus Books publish date: June 1st 1980
format: paperback pages: 216
language: English
ISBN:
087975205X (9780879752057)
publisher: Horizon Press publish date: January 1st 1974
format: hardcover pages: 216
language: English
ISBN:
0818013184 (9780818013188)