Jamison, Dennis B. & Cook, Neville G.W. AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THEEARTH'S CRUST, report, August 1, 1978; (https://digital.library.unt.edu/ark:/67531/metadc899288/m1/1/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .