- Publication venue
- Veenman
- Publication date
- 01/01/1964
- Field of study
- Publication venue
- [publisher not identified]
- Publication date
- 01/01/1956
- Field of study
- Publication venue
- Publication date
- 01/01/1977
- Field of study
- Publication venue
- Publication date
- 01/01/1968
- Field of study
- Publication venue
- Unknown Publisher
- Publication date
- 01/01/1986
- Field of study
- Publication venue
- Publication date
- 01/01/1977
- Field of study
- Publication venue
- Unknown Publisher
- Publication date
- Field of study