Negassi, A. Soil and water conservation manual for Eritrea/ Amanuel Negassi; Estifanos Bein; Kifle Ghebru and Bo Tengnas - Nairobi: RELMA, 2002. - x, 246p.: ill.; 29 cm. Includes bibliography and index ISBN: 9966896651 Subjects--Topical Terms: LC Class. No.: DUCE S623.N52