共 14 条
[1]
ANDERSON MA, 1955, P551 TENN VALL AUTH, P11
[2]
BEAL GM, 1957, RURAL SOCIOL, V22, P166
[3]
BLACKMORE J, 1955, P553 TENN VALL AUTH, P5
[5]
HILLMAN CH, 1956, OHIO AGR EXPT STAT R, V775, P22
[6]
*IA STAT COLL STAT, 1952, WALL FARM IOW HOM
[7]
Katz E., 1955, PERSONAL INFLUENCE, P180
[8]
Lazarsfeld P. F., 1944, PEOPLES CHOICE
[9]
LIONBERGER HF, 1951, MISSOURI AGR EXPT ST, V472
[10]
ROGERS EM, 1956, SEP M RUR SOC SOC E