1. : CORROSION/81, Paper No. 206, Toronto, April 6-10, 1981.
2. : CORROSION/81, Paper No. 207, Toronto, April 6-10, 1981.
3. : CORROSION/77, Paper No. 63, San Francisco, March 14-18, 1977.
4. : CORROSION/77, Paper No. 170, San Francisco, March 14-18, 1977.