Duignan, M; Charles Nash, C & Timothy Punch, T. HIGH ASPECT RATIO ION EXCHANGE RESIN BED - HYDRAULIC RESULTS FOR SPERICAL RESIN BEADS, article, September 27, 2007; (https://digital.library.unt.edu/ark:/67531/metadc884417/m1/1/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .