Cable, P.R.; Hofstetter, K.J.; Beals, D.M.; Jones, J.D.; Collins, S.L.; Noakes, J.E. et al. A remotely operated, field deployable tritium analysis system for surface and groundwater measurement, report, December 31, 1996; (https://digital.library.unt.edu/ark:/67531/metadc676402/m1/1/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .