Allen R G D <br/><br/>
Index numbers in theory and practice 

 - London  Macmillan            1975 
 - x,278p.  cm. 
<br/><br/> Bibliography P 270-74 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>B284, L5