Steel, Robert George Douglas. <br/><br/>
Principles and procedures of statistics 

 - New York :  McGraw-Hill,  1960 
 - 481 p. 
<br/><br/><label>LCCN: </label>57840 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estadística.
<br/><br/><label>Dewey Class. No.: </label>519.5  / S84