Steel,  Robert G. D. <br/><br/>
Principels and procedure of statistics 

 - New York :  Macgraw hill 
 - Statistics 
<br/><br/><br/>18 
<br/><br/> pbk 
<br/><br/><label>ISBN: </label>20 
<br/><br/><label>Dewey Class. No.: </label>310 STE-P STA. 74737