The classification of CM and CR chondrites using bulk H, C and N abundances and isotopic compositions
Alexander CMO’D, Howard KT, Bowden R and Fogel ML (in press) Geochimica et Cosmochimica Acta DOI: 10.1016/j.gca.2013.05.019 Volume 123, 15 December 2013, Pages 244–260 Available online 25 May 2013 LINK