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41490-Thumbnail Image.png
Created1930
Description

Typescript report, black and white, describing the birds of Grand Canyon National Park with cover drawing of a bald eagle.

41157-Thumbnail Image.png
Created1926-04-02
DescriptionGrand Canyon National Park General Regulations.
67288-Thumbnail Image.png
Created1977-09
DescriptionNatural resources management plan and environmental assessment for preserving natural resources within the park for use and enjoyment of visitors. The approach is guided by the concept of maintaining and perpetuating ecosystems rather than protecting or preserving individual features or favored species.