共 19 条
[2]
MALEC D, 1983, ANN M AM STATISTICAL
[4]
MARTIN JH, 1979, STATE GOVT AUT, P182
[5]
NAMBOODIRI NK, 1971, RURAL SOCIOL, V36, P187
[10]
SCHMITT RC, 1966, RURAL SOCIOL, V31, P355