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- Corporate/Agency Authors:
- Punt Industry, Soils, and Agricultural Engineering Bureau and Agricultural Research Administration
- Publisher:
- Punt Industry, Soils, and Agricultural Engineering Bureau
- Date:
- [Nov. 1933, slightly revised June 1946.] [1946.]
- SuDoc number:
- A 1.9:1714/2
- Corporate/Agency Authors:
- Punt Industry, Soils, and Agricultural Engineering Bureau and Agricultural Research Administration
- Publisher:
- Punt Industry, Soils, and Agricultural Engineering Bureau
- Date:
- [Mar. 1944, revised June 1946.] [1946.]
- SuDoc number:
- A 1.9:1950/2