1. Industrial uses of diamond;Busch,1979
2. Non-abrasive industrial uses of diamond;Caveney,1979
3. R. H. Wentorf, Jr., and W. A. Rocco, US Patent 3,745,623, July 17, 1973.
4. R. H. Wentorf, Jr., and W. A. Rocco, US Patent 3,767,371, October 23, 1973.