共 18 条
[2]
ELDER JP, 1988, ADOLESCENCE, V23, P689
[4]
GREER R, 1983, ORAL SURGERY, V56, P5
[7]
JOHNSTON LD, 1987, DHHS ADM871535 US DE
[8]
KLEINBAUM DG, 1982, EPIDEMIOLOGIC RES, P300
[9]
MARTY P, 1986, AM J PUBLIC HEALTH, V76, P90