Steward, George Coton <br/><br/>
The symmetrical optical system/ 
by G. C. Steward. 
 - Cambridge, UK:  The University press,  1958. 
 - viii, 102 p.:  diagrs.,  22 cm. 
 - Half-title: Cambridge tracts in mathematics and mathematical physics,  no. 25. .
 - Half-title: Cambridge tracts in mathematics and mathematical physics  no. 25. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optics.
<br/><br/><label>Dewey Class. No.: </label>535  / S849s