ANNUAL PROGRESS REPORT [ON HIGH ENERGY PHYSICS], TASK A, JUNE 1, 1970--MAY 31, 1971., report, October 31, 1971; (https://digital.library.unt.edu/ark:/67531/metadc1033669/m1/1/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .