Contributions to the study of coal ; Banded ingredients of no. 6 coal and their heating values as related to washability characteristics and preliminary report on unit coal-specific gravity curves of Illinois coals /
| Main Author: | |
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| Other Authors: | , |
| Format: | Book |
| Language: | English |
| Published: |
Urbana, Illinois,
[publisher not identified] ;
1934.
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| Series: | Report of investigations (Illinois State Geological Survey) ;
no. 34. |
| Subjects: |
| Item Description: | At head of title: Illinois. Department of Registration and Education. Division of the Geological Survey. |
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| Physical Description: | 61 pages : illustrations |
| Bibliography: | Bibliographical footnotes. |