共 15 条
- [1] BEALE N, 1985, J ROY COLL GEN PRACT, V35, P510
- [2] BEALE N, 1988, J ROY COLL GEN PRACT, V38, P197
- [3] BEALE N, 1988, J ROY COLL GEN PRACT, V38, P200
- [5] GOODMAN NM, 1952, INT HLTH ORG THEIR W, P187
- [6] HARRIS RD, 1987, TEENAGE PREGNANCY DE
- [7] HARRIS RD, 1986, EFFECTS UNEMPLOYMENT
- [8] MacMahon B, 1960, EPIDEMIOLOGICAL METH
- [10] SMITH J, 1988, CARE COMMUNICATI SEP, P6