publisher: Microsoft Press publish date: February 15th 1990
format: paperback pages: 383
language: English
ISBN:
1556152825 (9781556152825)
publisher: Microsoft Press publish date: March 5th 1988
format: paperback pages: 339
language: English
ISBN:
1556151241 (9781556151248)
publisher: Open University Press publish date: June 1976
pages: 50
ISBN:
0335062040 (9780335062041)