Koch, Richard. <br/><br/>
The 80/20 principle:  Achieve more with less. 

 - UK :  Nicholas brealey,  2022. 
 - xx, 408 p. :  22 cm 
<br/><br/><label>ISBN: </label>9781473656871 
<br/><br/><label>Dewey Class. No.: </label>GEN KOC