The underground attacks onCrocus andColchicum by the rustsUromyces croci andUromyces colchici respectively G. H. BoeremaH. A. van Kesteren OriginalPaper Pages: 136 - 144
Investigation ofHippeastrum mosaic virus inHippeastrum hybridum D. Hendrina BrantsJ. van den Heuvel OriginalPaper Pages: 145 - 151