Welford,  W.T <br/><br/>
Optics / 
W.T. Welford 
 - 2nd ed. 
 - Oxford :  English language university press,  1981 
 - vii, 150 p :  ill. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0194424286 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optics.<br/>Physics