- 1959[subject unknown]Research Assistants
- 1960[subject unknown]Research Assistants
- 1964[subject unknown]Independent
- 1965[subject unknown]Independent
- 1967[subject unknown]Independent
- 1968[subject unknown]Independent
- 1969[subject unknown]Independent
- 1970[subject unknown]Independent
- 1971[subject unknown]Independent
- 1972[subject unknown]Independent
- 1973[subject unknown]Independent
- 1974[subject unknown]Independent