Heung, L; Gregory Staack, G; James Klein, J & William Jacobs, W. METHOD TO TEST ISOTOPIC SEPARATION EFFICIENCY OF PALLADIUM PACKED COLUMNS, article, June 27, 2007; (https://digital.library.unt.edu/ark:/67531/metadc887089/m1/1/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .