Land Use and Spring Protection

Poster has a black printed background with white text. Across the top is "Land Use And Spring Protection" followed by a color illustration of a spring and surrounding land. At the left is an urban...

USGS: Science For A Changing World, Open House

Poster has a green background with white text. In the center is a satellite image of the San Francisco Bay Area. Poster reads, "USGS/ science for a changing world/ Open House/ U. S. Geological...


10-page brochure with the theme "A brief story of the geology of Yosemite Valley," a special issue of "Yosemite Nature Notes." Gives accounts and theories of the origins of Yosemite Valley,...

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