Clark, E.A.; Dauchess, D.A.; Heung, L.K.; Rabun, R.L. & Motyka, T. SRS history and experience with palladium diffusers. Revision 1, report, August 11, 1995; (https://digital.library.unt.edu/ark:/67531/metadc624717/m1/1/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .