共 34 条
[2]
ARMITAGE P, 1971, STATISTICAL METHODS
[3]
BLACKWELL B, 1979, PSYCHOSOMATICS, V20, P27
[4]
BROWNLEE A, 1978, SOC WORK HLTH CARE, V4, P197
[6]
CHRISTENSEN DB, 1978, HLTH SERV RES SUM, P171
[7]
COVEY LS, 1981, J OCCUP ENVIRON MED, V23, P537
[8]
*CTR DIS CONTR, 1976, AD US TOB 1975
[9]
DIXON WJ, 1983, BMDP STATISTICAL SOF