共 12 条
[2]
FOSTER D, 1987, DEPID21 U MICH SCH P
[3]
JEREB JA, 1991, MMWR, V40
[4]
KELINBAUM DG, 1982, EPIDEMIOLOGIC RES PR, P297
[5]
MCCRAY E, 1990, PUBLIC HEALTH REP, V105, P135
[6]
PITCHENIK AE, 1988, CLIN CHEST MED, V9, P425
[9]
1987, AM REV RESPIR DIS, V136, P492
[10]
1989, MMWR, V38, P236