Harris, Daniel C. (2010). "Charles David Keeling and the Story of Atmospheric CO2 Measurements". Analytical Chemistry (بالإنجليزية). 82 (19): 7865–7870. DOI:10.1021/ac1001492. ISSN:0003-2700. PMID:20536268.
Harris, Daniel C. (2010). "Charles David Keeling and the Story of Atmospheric CO2 Measurements". Analytical Chemistry (بالإنجليزية). 82 (19): 7865–7870. DOI:10.1021/ac1001492. ISSN:0003-2700. PMID:20536268.
Harris, Daniel C. (2010). "Charles David Keeling and the Story of Atmospheric CO2 Measurements". Analytical Chemistry (بالإنجليزية). 82 (19): 7865–7870. DOI:10.1021/ac1001492. ISSN:0003-2700. PMID:20536268.