Rossen, William R.; Johns, Russell T. & Pope, Gary A. Development of More-Efficient Gas Flooding Applicable to Shallow Reservoirs Progress Report, report, January 28, 2003; (https://digital.library.unt.edu/ark:/67531/metadc784797/m1/1/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .