Technical Progress Report, November 1, 1979-October 31, 1980. Report Npl-865. [Univ. Of Colorado], report, November 1, 1980; (https://digital.library.unt.edu/ark:/67531/metadc1187418/m1/1/: accessed July 15, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .

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