Variability of some plant species from different origins and their suitability for virus work J. P. H. Van Der WantM. L. BoerjanD. Peters OriginalPaper Pages: 205 - 216
Infection of offspring tulip bulbs by Botrytis tulipae during the growth period and after lifting Amelita W. DoornikB. H. H. Bergman OriginalPaper Pages: 217 - 225
Tentative description of Hippeastrum latent virus in Hippeastrum hybridum plants and differentiation from Hippeastrum mosaic virus J. E. Brölman-Hupkes OriginalPaper Pages: 226 - 236