Hymenoptera of America North of Mexico, synoptic catalog 

 - Washington :  Government Printing,  1951 
 - 1420 p. 
 - Agriculture monograph  ; 2 .
 - Agriculture monograph  ; 2 .
<br/><br/><label>LCCN: </label>42140 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Himenópteros--E.U.A.
<br/><br/><label>Dewey Class. No.: </label>595.79  / E83