Roots of human progress.
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
State College :
School of Mineral Industries,
[1948]
|
| Series: | E & MS experiment station circular ;
no. 31. |
| Subjects: |
| Item Description: | Cover title. |
|---|---|
| Physical Description: | 20 pages ; 21 cm. |