- 1971[position unknown]
- 1972[position unknown]
- 1972Associate Professor
- 1973[position unknown]
- 1973Associate Professor
- 1974[position unknown]
- 1975[position unknown]
- 1976[position unknown]
- 1977[position unknown]
- 1978[position unknown]
- 1978Professor
- 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]
- 1993[position unknown]
- 1994[position unknown]
- 1995[position unknown]
- 1996[position unknown]
- 1997[position unknown]
- 1998[position unknown]
- 1999[position unknown]
- 2000[position unknown]
- 1978Postdoctoral Fellow
- 1982[position unknown]
- 1983[position unknown]
- 1987[position unknown]
- 1983[position unknown]
- 1980[position unknown]
- 1972Assistant Professor
- 1982[position unknown]
- 1984[position unknown]
- 1988[position unknown]
- 1989[position unknown]
- 1990[position unknown]
- 1991[position unknown]