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1.- Stable isotope and trace element studies of black bear hair, Big Bend ecosystem, Texas and Mexico
U. S. Geological Survey; Reston, VA; USA; United States, 2008
Geological, geochemical, and geophysical studies by the U.S. Geological Survey in Big Bend National Park, Texas
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2.- Trace element and stable isotope studies of black bear hair, Big Bend National Park area, Texas and Mexico
Geological Society of America (GSA); Boulder, CO; USA; United States, 2007
Geological Society of America, 2007 annual meeting
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