... Studies of Iowa coals ..
| Corporate Author: | |
|---|---|
| Other Authors: | |
| Format: | Book |
| Language: | English |
| Published: |
Des Moines,
Pub. by the State of Iowa,
[1930]
|
| Series: | Its Technical paper no. 2
|
| Subjects: |
| Corporate Author: | |
|---|---|
| Other Authors: | |
| Format: | Book |
| Language: | English |
| Published: |
Des Moines,
Pub. by the State of Iowa,
[1930]
|
| Series: | Its Technical paper no. 2
|
| Subjects: |