共 6 条
[1]
CAMPBELL RR, 1966, RURAL SOCIOL, V31, P458
[2]
GRUNDY T, 1982, FARMER, V52, P7
[3]
HOWDEN RHG, 1981, COMMUNICATION
[4]
LIONBERGER JF, 1960, ADOPTION NEW IDEAS P
[5]
Lowe R, 1975, ED ADULTS WORLD PERS
[6]
Rogers E.M., 1971, CROSS CULT APPROACH