@book{59217,
	author = {"Tourroun,T.A., Bega,R.V. & Nelron, P.E., Ed."},
	title = {International Symposium on factors determining the behaviour of plant pathogens in soil : Proceedings of Root diseases and soil-borne pathogens},
	publisher = {California press },
	year = {London},
	address = {1970}
}