na INLIS000000000007275 Ind 0010-1118007275 Survey intensifikasi padi sawah analisa usahatani musim kering (m.k.) 1969 di Sumatera Barat NURDIN, Thamrin Thamrin Nurdin [Jakarta] Survey Agro Ekonomi 1970 xv, 50 p.: ill.; 29 cm. xv, 50 p.: ill.; 29 cm. 633.18NURs 633.18 FLOODED RICE INTENSIFICATION DRY SEASON WEST SUMATRA 18/D/71