共 10 条
[2]
GREENLICK MR, 1988, HLTH CARE RES HMO 2, pCH3
[6]
POPE CR, 1976, RES REPORT SERIES, V1
[9]
VOGT TM, 1985, AM J EPIDEMIOL, V122, P1030
[10]
VOGT TM, 1983, PUBLIC HLTH REV, V11, P121