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.
Rapid and synchronous collapse of marine and terrestrial ecosystems during the end-Permian biotic crisis
Richard J. Twitchett
Geology(2001),29(4):351
http://dx.doi.org/10.1130/0091-7613(2001)029<0351:RASCOM>2.0.CO;2

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