共 11 条
[2]
Cook P J, 1967, Br Dent J, V122, P441
[5]
Moser C.A., 1971, SURVEY METHODS SOCIA
[6]
SARLL D, 1980, THESIS U MANCHESTER
[8]
1978, BR DENT J, V144, P359
[9]
1980, DENTAL ED REPORT COM
[10]
1981, BETTER DENTAL HLTH