publisher: iUniverse.com
publish date: January 30th 2014
format: paperback pages: 104
ISBN:
1491718064 (9781491718063)
publisher: Worldwatch Institute publish date: June 28th 1988
format: paperback pages: 70
ISBN:
0916468852 (9780916468859)
publisher: Worldwatch Institute
publish date: May 1st 1999
format: paperback pages: 80
language: English
ISBN:
1878071483 (9781878071484)
publisher: DIANE Publishing Company publish date: July 28th 1998
format: paperback pages: 77
ISBN:
0788171887 (9780788171888)
publisher: Worldwatch Inst
publish date: December 31st 2002
format: paperback pages: 91
ISBN:
1878071653 (9781878071651)
ISBN:
0916468976 (9780916468972)