“Zwartbenigheid” bij tulp en iris, veroorzaakt doorSclerotium wakkerii nov. spec. G. H. BoeremaCilia J. M. Posthumus OriginalPaper Pages: 200 - 207
Some data on the occurrence of rattle virus at various depths in the soil and on its transmission H. H. Sol OriginalPaper Pages: 208 - 214
Abstracts of communications presented at the joint meeting of the “Nederlandse Planteziektenkundige Vereniging” and the “Nederlandse Kring Voor Plantevirologie” on 24 May 1962, Wageningen Abstract Pages: 215 - 217