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_a613.62 _bWOR _223 |
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| 100 | _aWORLD Health Organization | ||
| 245 | _aMethods used in establishing permissible levels in occupational exposure to harm | ||
| 260 |
_aGeneva _bWHO _c1977 |
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| 300 | _a68 p. | ||
| 440 | _aWHO Technical report series 601 | ||
| 650 | _aOccupational health | ||
| 650 | 0 |
_aHealth hazards _9119559 |
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| 650 | 0 |
_a WHO Technical report series 601 _9119565 |
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| 942 | _cPR | ||