Ref ID:	33739
Ref Type:	Journal Article
Authors:	Keeling, Charles D. Mook, Wim G. Tans, Pieter P.
Title:	Recent trends in the <sup>13</sup>C/<sup>12</sup>C ratio of atmospheric carbon dioxide
Date:	1979
Source:	Nature
Date Created:	8/13/2002
Volume:	277
Page Start:	121
Page End:	123