- Publication venue
- Beltsville,1945.
- Publication date
- Field of study
- Publication venue
- Washington, D.C. :U.S. Dept. of Agriculture,1916.
- Publication date
- 01/01/1916
- Field of study
no.406 (1916
- Publication venue
- Washington, D.C. :U.S. Dept. of Agriculture,1918.
- Publication date
- 01/01/1918
- Field of study
no.692 (1918