Similarity of clover yellow vein virus and pea necrosis virus L. BosK. LindstenD. Z. Maat OriginalPaper Pages: 97 - 108
A light and scanning-electron microscopic study of infection of tomato plants by virulent and avirulent races of Cladosporium fulvum Pierre J. G. M. De Wit OriginalPaper Pages: 109 - 122
Determination of the infection pressure of potato virus YN H. A. van Hoof OriginalPaper Pages: 123 - 127