by Robert L. Forward
publisher: Backinprint.com publish date: January 1st 2001
format: paperback pages: 352
language: English
ISBN:
0595167462 (9780595167463)
publisher: Del Rey Books publish date: May 23rd 1992
format: mass market paperback pages: 308
language: English
ISBN:
0345377729 (9780345377722)
publisher: Del Rey Books publish date: June 18th 1991
format: hardcover pages: 319
language: English
ISBN:
0345347129 (9780345347121)