APA (7th ed.) Citation

Kolker, A. (2021). Geochemical data for Illinois Basin coal samples, 2015-2018. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Kolker, Allan. Geochemical Data for Illinois Basin Coal Samples, 2015-2018. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2021.

MLA (9th ed.) Citation

Kolker, Allan. Geochemical Data for Illinois Basin Coal Samples, 2015-2018. U.S. Department of the Interior, U.S. Geological Survey, 2021.