共 9 条
- [1] BROWN CH, 1972, NIOSH20 RES REP
- [2] HUGHES EE, 1973, MAY AM IND HYG C BOS
- [3] JOHNSON BA, 1972, NIOSH21 RES REP
- [4] JOHNSON BA, 1972, NIOSH18 RES REP
- [5] JOHNSON BA, 1972, NIOSH19 RES REP
- [6] LYNCH JR, 1970, 32 T ANN M AM C GOV, P142
- [7] ROPER P, 1972, NIOSH22 RES REP
- [8] 1971, AM IND HYG ASSOC J, V32, P488
- [9] 1973, FEDERAL REGISTER, V38, P1145