Sealing openings in abandoned mines by pneumatic stowing
I tiakina i:
| Kaituhi matua: | |
|---|---|
| Ētahi atu kaituhi: | |
| Hōputu: | Pukapuka |
| Reo: | Ingarihi |
| I whakaputaina: |
[Avondale, Md.]
U.S. Dept. of the Interior, Bureau of Mines
1982
|
| Rangatū: | Report of investigations
8730 |
| Ngā marau: | |
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