共 12 条
- [1] BELLINGER WR, 1953, J KAN STATE DENT ASS, V37, P120
- [2] FRENZEL WW, 1964, VIRGINIA DENT J, V41, P9
- [3] FULTON JT, 1965, NATURAL HISTORY DENT, P43
- [4] FULTON JT, 1965, NATURAL HISTORY DENT, P15
- [5] KELLY JE, 1967, USPHS23 NAT CTR H 11
- [7] KLEIN H, 1941, U PENNSYLVANIA BICEN, P1
- [8] LARSON RH, 1966, ENVIRONMENTAL VARIAB, P89
- [9] MESSNER CT, 1936, USPHS226 PUBL HEALTH, P28
- [10] MILLER SL, 1962, PUB HEALTH DEN, V22, P61