Index to a revision of the British species of Sappaphis Matsumura /
Stroyan, H. L. G.(Henry Lindsay Gray),author.
Great Britain.Ministry of Agriculture, Fisheries and Food,issuing body.
Great Britain.Her Majesty's Stationery Office.
Part I. Introduction and Subgenus Sappaphis sensu stricto and a revision of the British species of Dysaphis Börner (Sappaphis Auctt. Nec Mats) -- Part II. The Subgenus Dysaphis sensu stricto.