na INLIS000000000002938 0010-0121001304 Metode dan Obyek Sosial Agronomi W.J Timmer [s.l] [s.n] 1980 249 p. ; 28 cm 63 63 AGRONOMY ECONOMY AGRONOMY-ECONOMY AGRONOMI METODE SOSIAL AGRONOMI. 4114 4114