The principles of agricultural entomology / C.A. Edwards and G.W. Heath. With a foreword by V.B. Wigglesworth. Edwards, C. A. (Clive Arthur), 1925- Heath, G. W. (Gordon William) joint author. Agricultural pests. SB931 .E38 1965 595.7 EDP Includes bibliographical references and index. London : Chapman and Hall, c1964. c1964. 1964 Text xiv, 418 p. (18) leaves of plates : eng