Mitchell, Theodore B. <br/><br/>
A generic revision of the Megachilene bees of the Western hemisphere (Hymeoptera: Megachilidae) 

 - Raleigh, N.C. :  Nort Carolina State University,  1980 
 - 95 p.  : ilus. ; gráfs 
 - Contribución from the Department of Entomology .
 - Contribución from the Department of Entomology .
<br/><br/><label>LCCN: </label>38587 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abejas.
<br/><br/><label>Dewey Class. No.: </label>595.799  / M5