共 28 条
- [21] 1986, DHHS PHS871232 PUBL
- [22] 1986, DHHS ADM861450 PUBL
- [23] 1987, MMWR, V36, P252
- [24] 1983, DHHS8450204 PUBL HLT
- [25] 1982, DHHS8250179 PUBL HLT
- [26] 1989, DHHS CDC898411 PUBL
- [27] 1981, DHHS PHS8150156 PUBL
- [28] 1984, DHHS PHS8450205 PUBL