books.google.com.auhttp://books.google.com.au/books/about/Imms_General_Textbook_of_Entomology_Volu.html?id=QRoiz58gyVIC&q=structure&utm_source=gb-gplus-shareImms' General Textbook of Entomology: Volume 1: Structure, Physiology and Development Volume 2: Classification and Biology