- Creator:
- University of Minnesota. Graduate School Research Center
- Contributor:
- Davis, E.W. (Professor Emeritus, Mines Experiment Station); Schwartz, George M. (Professor of Geology); Ziebarth, Elmer William
- Created:
- 1956-05-25; 1956-06-16; 1956-06-18
- Contributed By:
- University of Minnesota Libraries, University Archives.
- Last Updated:
- 2017-11-28
