共 32 条
[21]
*NAT CTR HLTH STAT, 1987, DHHS PUBL
[22]
NATARAJAN N, 1985, CANCER-AM CANCER SOC, V56, P1704, DOI 10.1002/1097-0142(19851001)56:7<1704::AID-CNCR2820560740>3.0.CO
[23]
2-L
[24]
NORTON CH, 1989, HEALTH SERV RES, V23, P725
[25]
*OFF TECHN ASS, 1990, HLTH CAR RUR AM
[26]
REED WL, 1990, BLACK AGED UNDERSTAN, P183
[27]
ROBINSON E, 1986, ISRAEL J MED SCI, V22, P333
[28]
*US BUR CENS, 1990, CIT COUNT DAT BOOK 1
[29]
VERNON SW, 1985, CANCER-AM CANCER SOC, V55, P1563, DOI 10.1002/1097-0142(19850401)55:7<1563::AID-CNCR2820550726>3.0.CO
[30]
2-1