Catalog of Hymenoptera in America north of Mexico 
prepared cooperatively by specialists on the various groups of Hymenoptera under the direction of Karl V. Krombein ... [et al.]. 
 - Washington  Smithsonian Institution Press  1979. 
 - 3 v.  29 cm. 
<br/><br/> "An outgrowth of ... Hymenoptera of America north of Mexico, synoptic catalog (1951) including the first and second supplements (1958, 1967)" 
<br/><br/>v. 1. Symphyta and Apocrita (Parasitica).--v. 2. Apocrita (Aculeata).--v. 3. Indexes. 
<br/><br/><label>LCCN: </label>78606008 //r81 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hymenoptera--North America.<br/>Insects--North America.
<br/><br/><label>LC Class. No.: </label>QL567.1.A1  / C37 
<br/><br/><label>Dewey Class. No.: </label>595.7/9097