Welford, W. T <br/><br/>
Aberrations of the symmetrical optical system 
W. T. Welford 
 - London  Academic Press  1974 
 - ix, 240p. 
<br/><br/><label>ISBN: </label>0-12-742050-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Aberrations<br/> Optics <br/>Astronomy and Astrophysics Thesaurus 
<br/><br/><label>Universal Decimal Class. No.: </label>535.313.6  / WEL