Successful remediation of four uranium calibration pits at Technical Area II, Sandia National Laboratories, Albuquerque, New Mexico, USA, article, December 31, 1994; (https://digital.library.unt.edu/ark:/67531/metadc717033/m1/1/: accessed June 8, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .