✦ LIBER ✦
Poland steps up research into mining safety
- Book ID
- 109717048
- Publisher
- Nature Publishing Group
- Year
- 1979
- Tongue
- English
- Weight
- 142 KB
- Volume
- 282
- Category
- Article
- ISSN
- 0028-0836
- DOI
- 10.1038/282770a0
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