Sandhouse, Grace Adelbert. <br/><br/>
The North American bees of the genus Osmia (Hymenoptera:  Apoidea) 
by Grace A. Sandhouse. 
 - Washington, D.C.,  The Entomological society of Washington,  1939. 
 - 2 p. l., 167 p.  11 pl.  26 cm. 
 - Memoirs of the Entomological society of Washington.  No. .
<br/><br/> Descriptive letterpress on versos of plates. 
<br/><br/><label>LCCN: </label>agr41000404  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bees--North America.
<br/><br/><label>LC Class. No.: </label>QL461  / .E58 no. 1