na INLIS000000000000262 20231106103321 0010-0422000262 231106 g 0 eng 0-8133-7356-5 en 631.171 243 WILLIAM K. JAEGER Agricultural Mechanization : The Economic of Animal Draft Power in West Africa United States of Amerika : Westview Press, 1986 - xiv, 195p.: ill.; 22 cm 631.171 WIL a Mekanisasi Pertanian