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Public economics / by Leif Johansen ; [Translated from the Norwegian by M.C. Brown and R.I. Christophursen]
- 336.3 J124
- Johansen, Leif.
- North-Holland Publishing Company,
- 1968.
- Amsterdam :
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Genetics of organophosphate resistance in the two-spotted spider mite (Tetranychus urticae koch) / by G.G.M. Schulten.
- Royal tropical institute. Department of agricultural research,
- 1968.
- Amsterdam :