By Stocking, Michael. London: Earthscan, 2001 . xii, 169p.: 1853838314
Place Hold on Handbook for the field assessment of land degradation /
]]>By Barron, Christopher J.. Cambridge : University Press, 1991 0521353335
]]>Rome : United Nations Environment Programme : Food and Agriculture Organization of the United Nations, 1983 , "M-57"--T.p. verso. 9251014043 (pbk.)
Place Hold on Guidelines for the control of soil degradation /
]]>