- Publication venue
- Washington,U. S. Govt. print. off.,1938.
- Publication date
- 01/01/1938
- Field of study
No full text
- Publication venue
- Washington :U.S. Govt. Print. Off. :1939.
- Publication date
- 01/01/1939
- Field of study
No full textno.30
- Publication venue
- Washington, D.C. :U.S. Dept. of Agriculture,1938.
- Publication date
- Field of study
No full textno.30