共 66 条
[1]
BEAL DW, 1963, FARM EC, V10, P114
[2]
BENOR D, 1977, AGRICULTURAL EXTENSI
[3]
Bhalla S.S., 1979, AGR STRUCT PRODUCT D, V1979, P141
[4]
BHATI UN, 1973, MALAYAN EC REV, V18, P36
[5]
BOWLES S, 1976, SCH CAPITALIST AM, P110
[6]
BOWMAN MJ, 1976, RURAL PEOPLE RURAL E
[7]
BOWMAN MJ, 1976, P NATIONAL ACADEMY E, V3, P261
[8]
Buck John Lossing, 1937, LAND UTILIZATION CHI
[9]
CALKINS PH, 1976, THESIS CORNELL U
[10]
CHAUDHRI DP, 1979, ED INNOVATION AGRICU