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International symposium on factors determining the behavior of plant pathogens in soil, 3rd, Minneapolis, 1973.
St Paul, Minn. : American Phytopathological Society, 1975.
Ecology of soil-borne plant pathogens.
International symposium on factors determining the behaviour of plant pathogens in soil, 1st, Berkeley(Calif.), 1963.
London : Murray, 1965.