Grumer, Joseph; Harris, Margaret E. & Rowe, Valeria R. Fundamental Flashback, Blowoff, and Yellow-Tip Limits of Fuel Gas-Air Mixtures, report, July 1956; (https://digital.library.unt.edu/ark:/67531/metadc38640/m1/1/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .