Ice core and firn air $^{14}$CH$_{4}$ measurements from preindustrial to present suggest that anthropogenic fossil CH$_{4}$ emissions are underestimated.

MLA

Hmiel, Benjamin, et al. “Ice Core and Firn Air $^{14}$CH$_{4}$ Measurements from Preindustrial to Present Suggest That Anthropogenic Fossil CH$_{4}$ Emissions Are Underestimated.” Geophysical Research Abstracts, vol. 21, Jan. 2019, p. 1. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=asx&AN=140494283&authtype=sso&custid=ns315887.

APA

Hmiel, B., Petrenko, V., Dyonisius, M., Buizert, C., Smith, A., Place, P., Harth, C., Beaudette, R., Hua, Q., Yang, B., Vimont, I., Schmitt, J., Etheridge, D., Fain, X., Weiss, R., & Severinghaus, J. (2019). Ice core and firn air $^{14}$CH$_{4}$ measurements from preindustrial to present suggest that anthropogenic fossil CH$_{4}$ emissions are underestimated. Geophysical Research Abstracts, 21, 1.

Chicago

Hmiel, Benjamin, Vasilii Petrenko, Michael Dyonisius, Christo Buizert, Andrew Smith, Philip Place, Christina Harth, et al. 2019. “Ice Core and Firn Air $^{14}$CH$_{4}$ Measurements from Preindustrial to Present Suggest That Anthropogenic Fossil CH$_{4}$ Emissions Are Underestimated.” Geophysical Research Abstracts 21 (January): 1. http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=asx&AN=140494283&authtype=sso&custid=ns315887.