Research paper RP1787-RP1788, RP1791-RP1795, RP1797, RP1799-RP1800, RP 1803, RP1805-RP1806. RP 1787. Electrical methods for diamond-die production; by Chauncey G. Peters, Walter B. Emerson, Karl F. Neffien, Forest K. Harris, and Irvin L. Cooter.