共 18 条
- [11] SAAH AJ, 1991, TANSCRIPT, V19, P7
- [13] TAPPIN DM, 1991, LANCET, V337, P1565
- [14] Urquhart G. E. D., 1987, Communicable Diseases in Scotland, V21, P5
- [16] 1990, LANCET, V335, P575
- [17] 1991, COMMUNICABLE DISEA S, V25, pA208
- [18] 1991, COMMUNICABLE DISEASE, V1, pR69