Johnson, B.K. <br/><br/>
Practical optics / 
B.K. Johnson. 
 - 2nd ed. 
 - London :  The Hatton Press Ltd,  1947. 
 - 224 p. :  ill. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optics