Shen, Shu-zhong <br/><br/>
Calibrating the end-Permian mass extinction.  [electronic resource] 

 -  Science (New York, N.Y.)  Dec 2011 
 - 1367-72 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>1095-9203 
<br/><br/><label>Standard No.: </label>10.1126/science.1213454  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Biodiversity<br/>Carbon Dioxide<br/>Carbon Isotopes<br/>China<br/>Ecosystem<br/>Extinction, Biological<br/>Fires<br/>Fossils<br/>Geologic Sediments<br/>Invertebrates--classification<br/>Isotopes<br/>Lead<br/>Mass Spectrometry<br/>Methane<br/>Oceans and Seas<br/>Plants--classification<br/>Radioisotope Dilution Technique<br/>Radiometric Dating<br/>Seawater--chemistry<br/>Time<br/>Uranium<br/>Vertebrates--classification