The Geological Society of America

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The Geological Society of America provides access to elements that are essential to the professional growth of earth scientists at all levels of expertise and from all sectors: academic, government, business, and industry.
MEMORIALS TO ELMER S. RIGGS (1869–1963)
CLIFFORD C. GREGG
Geological Society of America Bulletin(1964),75(9):P129
http://dx.doi.org/10.1130/0016-7606(1964)75[P129:MTESR]2.0.CO;2

The Geological Society of America
The Geological Society of America
GeoScienceWorld
GeoScience World