European potato journalJune 1962, Volume 5, Issue 2, pp 173–174 | Cite asReviewsAuthorsAuthors and affiliationsW. F. van VlietArticleFirst Online: 01 June 1962 12 Downloads This is a preview of subscription content, log in to check access.Copyright information© Kluwer Academic Publishers 1962Authors and AffiliationsW. F. van Vliet11.I.B.V.L.WageningenNetherlands