@article{842056, author = {T Coplen and W Brandt and M Gehre and Manfred Groning and HAJ Meijer and Blaza Toman and Jennifer Verkouteren}, title = {New Guidelines for d13C Measurements}, year = {2006}, number = {78 No 7}, month = {2006-04-01 00:04:00}, publisher = {Analytical Chemistry}, language = {en}, }