Washability characteristics of some Philippine coals / Telesforo A. Ejercito and Helen R. Lewis.
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| Další autoři: | |
| Médium: | Kniha |
| Jazyk: | Filipino |
| Vydáno: |
Manila
[Bureau of Mines]
c1967.
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| Edice: | Philippines, Republic. Bureau of Mines. Report of investigations; No. 64.
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| Témata: |