Silberstein, Ludwik . <br/><br/>
Simplified Method of Tracing Rays through any Optical System /  Textual Documents 
Ludwik Silberstein. 
 - London :  Longmans, Green & Co. ,  1918. 
 - 37p. ;  22 cm. 
<br/><br/><label>ISBN: </label> HB 
<br/><br/><label>Subjects--Index Terms: </label>Physics T/G-Physics 
<br/><br/><label>Dewey Class. No.: </label>535  / Si 32 Si