- 1998[position unknown]
- 1946Assistant Director
- 1951[position unknown]
- 1972Research Associate
- 1974Professor
- 1995[position unknown]
- 2008[position unknown]
- 2008[position unknown]
- 1985[position unknown]
- 1984[position unknown]
- 1985[position unknown]
- 2001[position unknown]
- 1967Faculty Of Sciences
- 1999[position unknown]
- 1985[position unknown]
- 1967[position unknown]
- 1998[position unknown]
- 1988[position unknown]
- 1976Professor
- 1989[position unknown]
- 2012[position unknown]
- 2017[position unknown]
- 2016Graduate Student