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1.- Nitrogen isotopes in preservable hard parts indicate trophic level; a case study from the Gulf of California Geological Society of America (GSA); Boulder, CO; USA; United States, 2011 Geological Society of America, 2011 annual meeting Ver registro
2.- Nitrogen isotopes ratios in marine/estuarine skeletal remains reconstruct ancient food chain Geological Society of America (GSA); Boulder, CO; USA; United States, 2008 Geological Society of America, 2008 annual meeting Ver registro
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