共 25 条
[21]
VALLIERES M, 1977, AM REV RESPIR DIS, V115, P867
[22]
VENABLES KM, 1985, BRIT J IND MED, V42, P517
[23]
1977, USDHEW NIOSH77185 PU
[24]
1987, AM C GOVT IND HYGIEN, P11
[25]
1978, FED REGISTER, V43, P27350