Gershuny, Grace. The soul of soil : a soil-building guide for master gardeners and farmers / - 4th ed. - White River Junction, Vt. : Chelsea Green Pub. Co., c1999. - xvi, 173 p. : ill. ; 23 cm. ISBN: 1890132314 (alk. paper) Subjects--Topical Terms: Soil management.Organic farming.Agricultural ecology. Dewey Class. No.: 631 GRA 1999 C074 Or.