Rycroft, David W. Prospects for the drainage of clay soils / David W. Rycroft, Mohamed H. Amer. - Rome : Food and Agriculture Organization of the United Nations, 1995. - xii, 134 p. : ill. ; 30 cm. - FAO irrigation and drainage paper, 51 0254-5284 ; . Includes bibliographical references. ISBN: 9251036241 (pbk.) Subjects--Topical Terms: Clay soils.Drainage.