The reserve base of U.S. coal by sulfur content (in two parts). 1. The Eastern States /
I tiakina i:
| Kaituhi matua: | |
|---|---|
| Kaituhi rangatōpū: | |
| Ētahi atu kaituhi: | |
| Hōputu: | Pukapuka |
| Reo: | Ingarihi |
| I whakaputaina: |
[Washington] :
U.S. Dept. of the Interior, Bureau of Mines,
[1975].
|
| Rangatū: | Information circular (United States. Bureau of Mines) ;
8680 |
| Ngā marau: | |
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