Christiansen, Scott. Introducing Ley Farming to the mediterranean basin - Aleppo, Syria : International Center for Agricultural Research in the Dry Areas, 1993 - 299 p. : ilus LCCN: 6727 Subjects--Topical Terms: Germoplasma.Ley Farming.Recursos genéticos--Conservación.Rotación de cultivos. Dewey Class. No.: 631.582 / C4