Watson, W.T. & Bussell, J.H., Westinghouse Hanford. Results of experimental tests and calibrations of the surface neutron moisture measurement probe, report, August 13, 1996; (https://digital.library.unt.edu/ark:/67531/metadc706671/m1/1/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .