Bland, Roger G. How to know the insects - 3 ed. - Dubuque, Iowa : Wm. C. Brown Company, 1978 - 408 p. : ilus. - The pictured key nature series . - The pictured key nature series . LCCN: 17905 Subjects--Topical Terms: Entomología económica.Entomología.Insectos. Dewey Class. No.: 595.7 / B5 1978