US Department of Commerce  Bureau of the Census. <br/><br/>
Fifteenth census of the United States: 1930. / 
US Department of Commerce, Bureau of the Census. 
 - Washington :  U.S. Govt. Print. Off.,  1930. 
 - v. :  maps, diagrs., forms. 
<br/><br/> V. 1 (1931, 1268 p.) : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Վիճակագրություն
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Census, 15th, 1930