Johnston, J.. <br/><br/>
Econometric Methods /  

 - Third Ed. /  
 - London :   McGraw-Hill Book Company ,   1967 
 - p.568,viii :  
<br/><br/><label>ISBN: </label>0-07-Y66357-2 
<br/><br/><label>Dewey Class. No.: </label>X0bB288  / M4