publisher: Penguin publish date: February 1st 1991
language: English
ISBN:
0886771331 (9780886771331)
publisher: DAW publish date: February 5th 1980
format: paperback
language: English
ISBN:
0879975164 (9780879975166)
language: English
ISBN:
0879977434 (9780879977436)
publisher: Daw Books publish date: 1979
format: mass market paperback pages: 256
language: English
ISBN:
0879978562 (9780879978563)