Youssef, Nabil N. Topography of the cephalic musculature and nervous systemm of the honey Apis mellifera linnaeus - Washington : Smithsonian Institution, 1971 - 54 p. : ilus. - Smithsonian contributions to zoology ; 99 . - Smithsonian contributions to zoology ; 99 . LCCN: 55529 Subjects--Topical Terms: Abejas--AnatomĂa y fisiologĂa.Apis mellifera.