Hatfield Hanry Stafford <br/><br/>
Inventions and their uses in science today / 
H. Stafford Hatfield. 
 - Harmondsworth, Middlesex, Eng.,   Penguin,  1940. 
 - 176 p. ;  19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions
<br/><br/><label>LC Class. No.: </label>T19