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Design practices for multiple-seam longwall mines /
I tiakina i:
| Kaituhi rangatōpū: | |
|---|---|
| Ētahi atu kaituhi: | |
| Hōputu: | Pukapuka |
| Reo: | Ingarihi |
| I whakaputaina: |
Avondale, Md. :
U.S. Dept. of the Interior, Bureau of Mines,
1993.
|
| Rangatū: | Information circular ;
9360 Information circular (United States. Bureau of Mines) ; 9360 |
| Ngā marau: | |
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