- 1960[subject unknown]Research Assistants
- 1961[subject unknown]Beginning
- 1962[subject unknown]Beginners
- 1963[subject unknown]Beginning
- 1964[subject unknown]Independent
- 1966[subject unknown]Independent
- 1967[subject unknown]Independent
- 1968[subject unknown]Independent
- 1969[subject unknown]Independent
- 1970[subject unknown]Independent
- 1973[subject unknown]Independent
- 1974[subject unknown]Independent
- 1975[subject unknown]Independent
- 1976[subject unknown]Independent Investigators
- 1977[subject unknown]Independent
- 1979[subject unknown]Independent
- 1980[subject unknown]Independent
- 1981[subject unknown]Other Research Personnel
- 1984[subject unknown]Other Research Personnel
- 1985[subject unknown]Other Research Personnel
- 1987[subject unknown]Library Readers