Jester, T. PV Cz silicon manufacturing technology improvements. Semiannual subcontract report, 1 April 1994--30 September 1994, report, September 1, 1995; (https://digital.library.unt.edu/ark:/67531/metadc623984/m1/1/: accessed December 9, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .