- Publication venue
- L.E.I.
- Publication date
- 01/01/1979
- Field of study
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- Publication venue
- L.E.I.
- Publication date
- 01/01/1969
- Field of study
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- Publication venue
- [s.n.]
- Publication date
- 01/01/1974
- Field of study
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- Publication venue
- Landbouw-Economisch Instituut
- Publication date
- Field of study
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- Publication venue
- [s.n.]
- Publication date
- 01/01/1973
- Field of study
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- Publication venue
- Landbouw-Economisch Instituut
- Publication date
- 01/01/1971
- Field of study
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