A fascinating biography of one of the foremost Odonatists of the 20th century. Proceedings of the 5th International Ephemeroptera Conference and the 9th International Plecoptera Conference. M.D. A Catalogue of the family and genus group taxa Ephemeroptera. Naturalists' Handbooks 13 Harker, J. Illustrations and plates by John Rodford. 115.00 Proceedings of International Symposia held at Smolenice Czechoslovakia 1985. with humorous illustrations.
Aphids constitute an economically significant group of phytophagous insects.
They are also important vectors for viruses. Moretti, G.P. Ser. Lyon July 1986. P.D. The Amateur Entomologist Vol.22. New edition 1992.