Mitchell, Wesley C. <br/><br/>
The making and using of index numbers / 
Wesley C. Mitchell ; US Dep. of Labor. Bureau of LAbor Statistics. 
 - Washington :  US Government Printing Office,  1938. 
 - bulletin. 
<br/><br/> Bl. 656 (1938, 114 p.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Վիճակագրություն