Ashmead, William H. <br/><br/>
A monograph of the North American proctotrypidae  / 
by William H. Ashmead 
 - Washington  :   Smithsonian Institution 
 - 472 p. + 18 láms. 
 - Bulletin of the United States National Museum; 45 .
<br/><br/><label>LCCN: </label>201913 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Proctotrypidae I. Smithsonian Institution
<br/><br/><label>Dewey Class. No.: </label>PA-C 595.79 A8