共 22 条
- [1] Agrawal P, 1983, Indian Pediatr, V20, P561
- [2] Bhatia P L, 1983, Indian J Cancer, V20, P43
- [5] Fleiss JL., 1981, STAT METHODS RATES P, V2
- [6] GLOVER ED, 1984, HEALTH VALUES, V8, P21
- [7] ORAL-TISSUE ALTERATIONS ASSOCIATED WITH THE USE OF SMOKELESS TOBACCO BY TEEN-AGERS .1. CLINICAL FINDINGS [J]. ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS, 1983, 56 (03): : 275 - 289
- [8] HETH J, 1982, DES MOINES REGI 0606
- [10] KRISHNA K, 1978, BRIT J OBSTET GYNAEC, V85, P726, DOI 10.1111/j.1471-0528.1978.tb15591.x