- 1969Research Associate
- 1988[position unknown]
- 2001[position unknown]
- 1981[position unknown]
- 1979[position unknown]
- 2002[position unknown]
- 2003[position unknown]
- 2006[position unknown]
- 2007[position unknown]
- 2008[position unknown]
- 2009[position unknown]
- 1980[position unknown]
- 1981[position unknown]
- 1969Associate Professor
- 1975[position unknown]
- 1976[position unknown]
- 1977[position unknown]
- 1978[position unknown]
- 1979[position unknown]
- 1980[position unknown]
- 1981[position unknown]
- 1982[position unknown]
- 1983[position unknown]
- 1984[position unknown]
- 1985[position unknown]
- 1986[position unknown]
- 1988[position unknown]
- 1989[position unknown]
- 1990[position unknown]
- 1991[position unknown]
- 1992[position unknown]
- 1975[position unknown]
- 1976[position unknown]
- 1977[position unknown]
- 1978[position unknown]
- 1979[position unknown]
- 1980[position unknown]
- 1981[position unknown]
- 1982[position unknown]
- 1983[position unknown]
- 1984[position unknown]
- 1985[position unknown]
- 1986[position unknown]
- 1987[position unknown]
- 1988[position unknown]
- 1989[position unknown]
- 1990[position unknown]
- 1991[position unknown]
- 1992[position unknown]