na INLIS000000000002971 0010-0121001337 Multi-Period Budgeting and Economic Assessment of Perenial Crops Intercropping Systems D.M. Etherington Canbera Australian National University Press 1981 iii, 47 p. : 336.12 336.12 BUGETS INTERCROPPING CROPS DANA TUMPANGSARI. 4149 4149