Drew, J. V. Selected papers in soil fromation and classification - Madison, Wis. : Soil Science Society of America, 1973 (c.1967) - 432 p. : ilus. ; gráfs. - Special publication series ; 1 . - Special publication series ; 1 . LCCN: 21316 Subjects--Topical Terms: Suelos--Clasificación.Suelos--Formación. Dewey Class. No.: 631.44 / D7