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- Corporate/Agency Authors:
- National Park Service and Interior Dept.
- Publisher:
- National Park Service
- Date:
- [Reprint with slight changes, Mar. 1948.]
- SuDoc number:
- I 20.21:M 83/2/947/rep.
- Corporate/Agency Authors:
- National Park Service and Interior Dept.
- Publisher:
- National Park Service
- Date:
- [1948.]
- SuDoc number:
- I 20.21:B 48/948
- Corporate/Agency Authors:
- National Park Service and Interior Dept.
- Publisher:
- National Park Service
- Date:
- [Revised 1947.] [1947.]
- SuDoc number:
- I 20.21:D 61/047
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1946.]
- SuDoc number:
- I 20.21:W 27/946
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- Jan. 10, 1940
- SuDoc number:
- I 20.21:D 34/940
- Corporate/Agency Authors:
- National Park Service and Interior Department
- Publisher:
- National Park Service
- Date:
- [1940.]
- SuDoc number:
- I 20.21:Sa 3/940