Preserving wilderness in our national parks ; a program for preventing overuse of the national parks through regional recreation planning outside the parks.
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| Format: | Book |
| Language: | English |
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Washington :
National Parks and Conservation Association,
[1971]
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| Item Description: | "Studies ... commissioned by the National Parks and Conservation Association." |
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| Physical Description: | xviii, 122 pages : illustrations, maps. ; 29 cm. |