Disease resistance in agricultural crops : NJF - Seminar no. 188 / Editor Oleif Elen. -- As : Norwegian agric. advisory service, 1992. -- 118 s. -- (Norwegian journal of agricultural sciences. Suppl. No. 7/1992). -- obr., tab. -- ISSN 0801-5341. choroby rastlín hubové * odolnosť rastlín * choroby obilnín