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Zwei Saesysteme im Praxistest \ Top agrar : das Magazin für moderne Landwirtschaft. Ausgabe SR [Artikel]
Gruber, W. \ Doersch, L. \ Lenge, R. \ 1998
In twee artikelen een vergelijking tussen mechanisch en pneumatisch aangedreven zaaiwerktuigen van Amazone, Lemken en Rabe
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