Leonard, Jonathan Norton,  1903-1975. <br/><br/>
Tools of tomorrow / 
[by] Jonathan Norton Leonard. 
 - x, 310 pages :  plates, diagram ;  22 cm. 
<br/><br/> Title on two leaves. 
<br/><br/><label>LCCN: </label>35005845  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology.<br/>Machinery.<br/>Civilization--History.
<br/><br/><label>LC Class. No.: </label>T47  / .L4 
<br/><br/><label>Dewey Class. No.: </label>621.9