Contributions to the study of coal ; proximate analyses and screen tests of coal mine screenings produced in Illinois /
| Main Author: | |
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| Other Authors: | , |
| Format: | Book |
| Language: | English |
| Published: |
Urbana, Illinois,
[publisher not identified] ;
1935.
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| Series: | Report of investigations (Illinois State Geological Survey) ;
no. 38. |
| Subjects: |
| Item Description: | At head of title: State of Illinois. Department of Registration and Education. |
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| Physical Description: | 30 pages : illustrations |