共 12 条
[1]
CLARK C, 1970, ECONOMICS SUBSISTENC
[2]
CLAYTON E, 1964, AGRARIAN DEVELOPMENT
[3]
DENMAN DR, 1974, GEOGRAPHICAL MAG NOV
[4]
EDWARDS DT, 1961, REPORT ECONOMIC STUD
[5]
EVANS DCP, 1975, COMMUNICATION
[6]
GITTINGER JP, 1972, ECONOMIC ANALYSIS AG
[7]
GORDON JC, 1971, MODEL ESTIMATING FUT
[8]
HARDIE JDM, 1976, 12 SCH AGR MISC PUBL
[9]
HASWELL M, 1973, TROPICAL FARMING ECO
[10]
HASWELL M, 1976, EXPT AGRICULTURE, V10, P281