TY - BK AU - Stakman,E.C. AU - Harrar,J.G. TI - Principles of plant pathology U1 - 632.3 PY - 1957/// CY - New York (USA) PB - Ronald Press, KW - Chemical control KW - Classification KW - Disease control KW - Disease resistance KW - AGROVOC KW - Disease transmission KW - Environmental factors KW - Pests of plants KW - Plant diseases KW - Plant pathology KW - Viruses N1 - Illustrations, tables, appendices p. 550-558, indexes p. 559-581 ER -