Ordish, George Untaken harvest: man's loss of crops from pest, weed and disease; an introductory study / George Ordish - London : Constable , 1952 - xii, 170p. : ill. ; 20 cm. Includes bibliographical references and index. Subjects--Topical Terms: AgricultureWeedsAgricultural pestsPlant protection Dewey Class. No.: 632 / ORD