Hetzel, F V. <br/><br/>
Belt conveyors and belt elevators 

 - London  John Wiley  1952 
 - vii,439p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Elevators
<br/><br/><label>Dewey Class. No.: </label>621.86  / H59B