Riggs, C. H.; Wey, John E.; Sanabria, Edward, Jr.; Meadows, Paul; Smith, William C. & West, James A. Petroleum-Engineering Study of Healdton Oil Field, Carter County, Oklahoma, report, February 1953; (https://digital.library.unt.edu/ark:/67531/metadc38588/m1/1/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .