共 21 条
[1]
Bradshaw J, 1972, PROBLEMS PROGR MED C, P69
[2]
BULMAN JS, 1997, STAT DENT, P78
[3]
HELDERMAN WHV, 1990, COMMUNITY DENT ORAL, V18, P85
[4]
JOHNSON JR, 1973, ACTA ODONTOL SCAND, V31, P297
[5]
Kayser A F, 1985, Community Dent Health, V2, P285
[9]
*MIN HLTH, 1997, NAT OR HLTH SURV 199