National park survey : the interpretive programs of the national parks; their development, present status, and reception by the public /
| Main Author: | |
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| Format: | Thesis Microform Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1949.
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| Subjects: |
| Item Description: | Microform. |
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| Physical Description: | 2 volumes (510 pages, 22 unnumbered leaves) |
| Bibliography: | Includes bibliographical references. |