Grace H.W <br/><br/>
Handbook on Patents 

 - London  Charles Knight and Company UK       1971 
 - 185 
<br/><br/><label>Standard No.: </label>18,647 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PATENT
<br/><br/><label>Dewey Class. No.: </label>Z2,2673, L1