Patel, Sharad A.; Bloom, Martin; Erickson, Burton; Chwick, Alexander & Hoff, N. J. Development of equipment and of experimental techniques for column creep tests, report, September 1955; (https://digital.library.unt.edu/ark:/67531/metadc57870/m1/1/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .