Annual report of the board of regents of the Smithsonian institution, showing the operations, expenditures, and condition of the institution 

 - Washington  Government printing office  1906 
 -  120p. ; 24 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1906<br/>Science
<br/><br/><label>Universal Decimal Class. No.: </label>2a  / E6