TY - BOOK AU - Ponsen, M. B. TI - The site of potato lefroll viruses multiplication in its vector, Myzus persicae: : an anatomical study T2 - Mededelingen Landbouwhogeschool U1 - 635.21 PY - 1972/// CY - Wageningen PB - Veenman & Zonen KW - Papa KW - Enfermedades por virus ER -