共 13 条
[2]
Coates B.E.., 1971, REGIONAL VARIATIONS
[3]
Cook P J, 1967, Br Dent J, V122, P441
[4]
DUNNING JM, 1970, PRINCIPLES DENTAL PU
[5]
GRAY PG, 1970, ADULT DENTAL HLTH EN
[6]
HILL FJ, 1974, THESIS U MANCHESTER
[8]
Moser C.A., 1971, SURVEY METHODS SOCIA
[9]
RICHARDS N D, 1965, Br Dent J, V118, P199
[10]
RICHARDS ND, 1971, SOCIAL SCI DENTISTRY