Yaggee, F. L. & Untermyer, Samuel, 1912-. The Relative Thermal Conductivities of Liquid Lithium, Sodium, and Eutectic NaK, and the Specific Heat of Liquid Lithium, report, April 21, 1950; (https://digital.library.unt.edu/ark:/67531/metadc100940/m1/1/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .