Statistical abstract of the United States, 1956. 

 - 77th ed. 
 - Washington, D. C. :  Department of Commerce,  1956. 
 - xv, 1048 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 974-1008. 
<br/><br/>328  328 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics--United States.
<br/><br/><label>Dewey Class. No.: </label>317.3 / U3s