Thelibrary of Congress and its work :  A selection of pictures with descriptive text / 

 - washington :  Government printing office,  1950. 
 - 64 p. ;  ill. ;  26 cm. 
 - 77 (73) (064) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Գրադարաններ--ԱՄՆ
<br/><br/><label>Universal Decimal Class. No.: </label>77 (73) (064)