1915---The-Missing-Years-III

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Creating the National Park System - The Missing Years

"Hoofed Locusts," 1917

Summer in the Parks, 1917

Exploring a New World of Parks, 1917

Light at the End of the Tunnel, 1917

Park and Resource Preservation, 1918

A Creed for the Park Service, 1918

Greater Yellowstone, 1918

"I'm Coming Down to Washington," 1918

A Step Backward, 1918

A New Year and a New Future, 1919