Christy, Lawrence C. Legislative principles of soil conservation / by Lawrence C. Christy - Rome : Food and Agriculture Organization of the United Nations, 1971. - 68p. ; 36 cm. - FAO Soils bulletin ; 15 . ISBN: 9251002576 Subjects--Topical Terms: Soil conservation--Developing countries. Dewey Class. No.: 305.42 / LEG 1985