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|
Miners' safety and health almanac for 1919-
| Author: | Williams, Ralph Chester, |
|---|---|
| Year: | 1918 |
| Issuing Agency: | Govt. print off., |
| Subjects: | Public health |
| Hygiene | |
| Coal miners--Health and hygiene | |
| Links: | https://hdl.handle.net/2027/mdp.39015077562125 |
| 1922 |
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