Vernon, H. M. <br/><br/>
Industrial fatigue and efficiency / 
H. M. Vernon 
 - London  George Routledge & sons ltd  1921 
 - viii, 264 p. 
<br/><br/><label>ISBN: </label>72404 
<br/><br/><label>Dewey Class. No.: </label>331.8  / VER