Protected area management

Yosemite National Park : rules and regulations 1920 - 1929

Yellowstone National Park, Wyoming : rules and regulations 1923, 1924, 1927

1927

State recreation parks, forests and game preserves

1928 Ward Nelson, Beatrice |

Proceedings of the tenth National Park Conference

1928

Proceedings of the eight and ninth National Park Conferences

Joffe, Joseph |

Proceedings of the fourth National Parks Conference

1917

Proceedings of the third National Parks Conference

1915

Proceedings of the second National Park Conference

1913

Proceedings of the first National Park Conference

1912
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