Wilkins, K. (1997). Hydrogeologic report of the Pennsylvanian Minor Groundwater Basin and the Ashland Isolated Terrace Groundwater Basin in Coal, Pittsburg and Haskell Counties. Oklahoma Water Resources Board, Water Management Division.
Chicago Style (17th ed.) CitationWilkins, Kent. Hydrogeologic Report of the Pennsylvanian Minor Groundwater Basin and the Ashland Isolated Terrace Groundwater Basin in Coal, Pittsburg and Haskell Counties. [Oklahoma City, Okla.]: Oklahoma Water Resources Board, Water Management Division, 1997.
MLA (9th ed.) CitationWilkins, Kent. Hydrogeologic Report of the Pennsylvanian Minor Groundwater Basin and the Ashland Isolated Terrace Groundwater Basin in Coal, Pittsburg and Haskell Counties. Oklahoma Water Resources Board, Water Management Division, 1997.