Duke - Elder, Stewart  Sir <br/><br/>
The practice of refraction/ 
Sir Stewart Duke - Elder 
 - 7th ed. 
 - London:  J and A Churchill,  1963 
 - x, 326 p.;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Eye--Accomodation and refraction<br/>Astigmatism<br/>Eye--Refractive errors<br/>Myopia
<br/><br/><label>Dewey Class. No.: </label>617.755