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- Corporate/Agency Authors:
- National Park Service
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 29.15/2:940/6
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 29.15/2:940/5
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 29.15/2:940/10
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 29.15/2:940/9
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 29.15/2:940/3
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 29.15/2:940/12
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 29.15/2:940/11
- Corporate/Agency Authors:
- Agricultural Economics Bureau and Agriculture Department
- Publisher:
- Agricultural Economics Bureau
- Date:
- June 1938 [reprint 1940]
- SuDoc number:
- A 1.36:619/1-2
- Corporate/Agency Authors:
- Agricultural Chemistry and Engineering Bureau and Agriculture Department
- Publisher:
- Agricultural Chemistry and Engineering Bureau
- Date:
- 1940
- SuDoc number:
- A 70.4:62
- Corporate/Agency Authors:
- Plant Industry Bureau and Agriculture Department
- Publisher:
- Plant Industry Bureau
- Date:
- [Apr. 1927, revised Nov. 1939, reprint 1940.]
- SuDoc number:
- A 1.9:1520/2-2