Larsen, Egon, <br/><br/>
Kasaysayan ng imbensiyon / 
Egon Larsen. 
 - Maynila :  Regal Pub.,  c1975. 
 - xiv, 484 p. ;  cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions.
<br/><br/><label>Dewey Class. No.: </label>608.7