Multiplication of soilborne wheat mosaic virus (SBWMV) in wheat roots infected by a soil carrying SBWMV and wheat yellow mosaic virus (WYMV) Djabbar HARIRI, Michel COURTILLOT, Pascal ZAOUI and Hervé LAPIERREAgronomie, 7 10 (1987) 789-796DOI: https://doi.org/10.1051/agro:19871005