Group analysis using ELISA : determination of the level of transmission of Soybean Mosaic Virus in soybean seed Yves MAURY, Camille DUBY, Jean-Marie BOSSENNEC and Geneviève BOUDAZINAgronomie, 5 5 (1985) 405-415DOI: https://doi.org/10.1051/agro:19850504