by Isaac Asimov, Charles G. Waugh, Martin H. Greenberg
publisher: Signet publish date: April 4th 1989
format: mass market paperback pages: 352
language: English
ISBN:
0451159268 (9780451159267)
publisher: Robinson publish date: January 1st 1989
format: mass market paperback pages: 351
language: English
ISBN:
1854870416 (9781854870414)
publisher: Random House Value Publishing publish date: May 29th 1985
format: hardcover pages: 246
language: English
ISBN:
0517551101 (9780517551103)