publisher: Ballantine Books Inc. publish date: January 1st 1971
format: paperback pages: 160
language: English
ISBN:
0345022866 (9780345022868)
publisher: Pan Books/Macmillan Publishers Ltd. publish date: February 18th 1972
format: paperback pages: 160
language: English
ISBN:
034509719X (9780345097194)