共 17 条
[3]
BLACKMON D, 1979, ALA J MED SCI, V16, P60
[6]
Fleiss JL., 1981, STAT METHODS RATES P, V2
[8]
HOPKINS CE, 1975, MED CARE, V13, P648
[9]
MINERS LA, 1978, HLTH SERV RES, V13, P75