Farley, John M; Smith, Robert E & Povolny, John H. Preliminary experiments with pilot burners for ram-jet combustors, report, January 2, 1953; (https://digital.library.unt.edu/ark:/67531/metadc59585/m1/1/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .