plant virology by Hull. http://ghaen.kj-agrijahad.ir/files/tolidate%20giyahi/hefze%20nabatat/comparative%20plant%20virology%DA%A9%D8%AA%D8%A7%D8%A8%20%D9%88%DB%8C%D8%B1%D9%88%D8%B3%20%D8%B4%D9%86%D8%A7%D8%B3%DB%8C%20%DA%AF%DB%8C%D8%A7%D9%87%DB%8C.pdf

http://ghaen.kj-agrijahad.ir/files/tolidate%20giyahi/hefze%20nabatat/comparative%20plant%20virology%DA%A9%D8%AA%D8%A7%D8%A8%20%D9%88%DB%8C%D8%B1%D9%88%D8%B3%20%D8%B4%D9%86%D8%A7%D8%B3%DB%8C%20%DA%AF%DB%8C%D8%A7%D9%87%DB%8C.pdf