21st Century U.S. Energy Sources: A Primer, report, May 19, 2017; (https://digital.library.unt.edu/ark:/67531/metadc990756/m1/2/: accessed April 30, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
21st Century U.S. Energy Sources: A Primer, report, May 19, 2017; (https://digital.library.unt.edu/ark:/67531/metadc990756/m1/2/: accessed April 30, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .