Washability characteristics of some Philippine coals / Telesforo A. Ejercito and Helen R. Lewis.
| Main Author: | |
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| Other Authors: | |
| Format: | Book |
| Language: | Filipino |
| Published: |
Manila
[Bureau of Mines]
c1967.
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| Series: | Philippines, Republic. Bureau of Mines. Report of investigations; No. 64.
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| Subjects: |