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The inspection of dutch seed potatoes-the importance of approval. Sanne R Liefrink. . 2005
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Some vital statistics. Netherlands potato consultative foundation. http://www.nivaa.nl/uk/about_potatoes/potato-country/some-vital-statistics.html . 2014
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On the road to potato processing. A J Haverkort,C D.Vanloon,P Van Eijck P. . 2002
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Netherlands catalogue of potato varieties. Hans M.G Peeten. . 2007
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Organisatie. Nederlandse Algemene Keuringsdienst. http://www.nak.nl/organisatie.htm . 2014