Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sakugawa Hiroshi and Kaplan Isaac R.,Radio- and stable-isotope measurements of atmospheric carbon monoxide in Los Angeles.,GEOCHEMICAL JOURNAL,00167002,GEOCHEMICAL SOCIETY OF JAPAN,1997,31,2,75-83,https://cir.nii.ac.jp/crid/1390282679527970432,https://doi.org/10.2343/geochemj.31.75