publisher: Aztex Corporation publish date: September 1st 1980
format: paperback pages: 96
language: English
ISBN:
0894040405 (9780894040405)
publisher: Stephens publish date: June 1980
format: Unknown Binding pages: 96
language: English
ISBN:
0850594243 (9780850594249)
publisher: Patrick Stephens Limited publish date: January 1st 1980
format: paperback pages: 96
language: English
ISBN:
0850594235 (9780850594232)