cam a22 u 4500 128630922 CHVBK 20200331052551.0 880212q19709999sz | 00 |eng|d (NEBIS)000271881 ETH-BIB ger ETH-BIB ETHICS-ISBD 1968-1972 106 p. 1977. Occupational safety and health series 40 40 (NEBIS)000004982 353899798 International report on the prevention and suppression of dust in mining, tunnelling and quarrying Report 5 5 (NEBIS)000271879 ETH nebis E2 NEBIS 490 -- Occupational safety and health series 40 40 (NEBIS)000004982 353899798 NEBIS 490 -- International report on the prevention and suppression of dust in mining, tunnelling and quarrying Report 5 5 (NEBIS)000271879 SWISSBIB 074469797 BK020000 XK020000 XK020000 NEBIS E16 E16 RH P 515382: 40 EX.A NEBIS E16 E16 RH P 515382: 40