共 6 条
[2]
DAVIES GN, 1974, J PERIODONTAL RES, V9, P67
[3]
GREENE JC, 1964, J AM DENT ASSOC, V68, P27
[4]
OLIVER RC, 1976, INT DENT J, V26, P435
[5]
RUSSELL A. L., 1956, JOUR DENTAL RES, V35, P350, DOI 10.1177/00220345560350030401
[6]
1977, ORAL HLTH SURVEYS BA