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1. Harvesting one hundredfold :   Publication: Kenya : UNEP, 1989 . vii, 62 p. Date:1989 Availability: Copies available: Faculty of Earth and Environmental Sciences SEES Collection [GE70 M4] (1), Actions: Add to cart No cover image available No cover image available
2. Beyond the limits :   Publication: London: Earthscan Pub., 1992 . xix, 300 p. : Date:1992 Availability: Copies available: Turkeyen Campus Processing Center [HD75.6 M43] (1), Actions: Add to cart