共 18 条
[12]
PRICHARD JF, 1979, DIAGNOSIS TREATMENT, P161
[16]
ROSS IF, 1980, J PERIODONTOL, V50, P450
[17]
SAXE SR, 1969, DENT CLIN N AM, V13, P783
[18]
SILNESS J, 1964, Acta Odontol Scand, V22, P121, DOI 10.3109/00016356408993968