APA (7th ed.) Citation

Mathews, J. E., & Wilde, E. M. (1989). Coal stratigraphy and correlation in the Sidney 30x60-minute quadrangle, eastern Montana and adjacent North Dakota: Coal and clinker outcrop, structure contour, coal isopach, and interburden isopach maps of the Prittegurl, Pust, Elvirio, and Sears intervals. Montana Bureau of Mines and Geology.

Chicago Style (17th ed.) Citation

Mathews, Jane E., and E. M. Wilde. Coal Stratigraphy and Correlation in the Sidney 30x60-minute Quadrangle, Eastern Montana and Adjacent North Dakota: Coal and Clinker Outcrop, Structure Contour, Coal Isopach, and Interburden Isopach Maps of the Prittegurl, Pust, Elvirio, and Sears Intervals. [Butte, Mont.]: Montana Bureau of Mines and Geology, 1989.

MLA (9th ed.) Citation

Mathews, Jane E., and E. M. Wilde. Coal Stratigraphy and Correlation in the Sidney 30x60-minute Quadrangle, Eastern Montana and Adjacent North Dakota: Coal and Clinker Outcrop, Structure Contour, Coal Isopach, and Interburden Isopach Maps of the Prittegurl, Pust, Elvirio, and Sears Intervals. Montana Bureau of Mines and Geology, 1989.