Elderton, William Palin <br/><br/>
Systems of Frequency Curves 
/ by William Palin Elderton 
 - London:  Cambridge University Press,  1969. 
 - vii, 216p.; 
<br/><br/><label>ISBN: </label>521073693 
<br/><br/><label>Dewey Class. No.: </label>519.532  / ELD/S