共 7 条
[1]
BIRKELAND JM, 1977, SCAND J DENT RES, V85, P31
[5]
Ripa L W, 1977, J Prev Dent, V4, P25
[6]
1977, NIH77450 DHEW PUBL
[7]
1977, NIH771196 DHEW PUBL