Day R.A.,Underwood A.L.,. <br/><br/>
Quantitative Analysis  Textual Documents 

 - 1993 /   6th. 
 - New Delhi :  P H I  . 
 - 685p. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Dewey Class. No.: </label>545  / DAY