Dieckman, S. L.; Jendrzejczyk, J. A. & Raptis, A. C. Development of a magnetic resonance sensor for on-line monitoring of {sup 99}Tc and {sup 23}Na in tank waste cleanup processes: Final report and implementation plan, report, February 24, 2000; (https://digital.library.unt.edu/ark:/67531/metadc706190/m1/1/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .