- 1972[subject unknown]Research Assistants
- 1973[subject unknown]Independent
- 1974[subject unknown]Independent
- 1977[subject unknown]Independent
- 1978[subject unknown]Library Readers
- 1979[subject unknown]Library Readers
- 1980[subject unknown]Independent
- 1981[subject unknown]Independent
- 1982[subject unknown]Independent
- 1984[subject unknown]Library Readers
- 1989[subject unknown]Independent