by Robert L. Forward
publisher: iUniverse publish date: January 17th 2001
format: paperback pages: 268
language: English
ISBN:
0595167489 (9780595167487)
publisher: Del Rey Books publish date: August 12th 1986
format: mass market paperback pages: 339
language: English
ISBN:
0345312333 (9780345312334)
language: English
ISBN:
0345312325 (9780345312327)
language: English
ISBN:
0450419088 (9780450419089)
publisher: Ocean View Books publish date: June 1st 1985
format: hardcover pages: 340
language: English
ISBN:
0938075659 (9780938075653)