na INLIS000000000006822 Ind 0010-1118006822 Diversity of fields farmers: explaining yield variations in North Cameroon PIETERS, Bart de Steenhuijsen Bart de Steenhuisen Pieters Wageningen Landbouwuniversiteit 1995 iv, 226 p.: ill.; 24 cm iv, 226 p.: ill.; 24 cm Bibl. p.199-216 [Thesis (S3) Landbouwuniversiteit te Wageningen 1995 631.151 FARMING SYSTEMS PRODUCTION FARM MANAGEMENT CAMEROON 251/96