publisher: Routledge
format: paperback pages: 208
language: English
ISBN:
0415609739 (9780415609739)
publisher: Open University Press
format: hardcover pages: 107
language: English
ISBN:
0335099246 (9780335099245)
publisher: Open University Press publish date: February 1st 1993
format: hardcover pages: 107
language: English
ISBN:
033509919X (9780335099191)