John W.T.Walsh <br/><br/>
Photometry 
John W.T. Walsh 
 - London  Constable and  Company, Ltd.  1953 
 - 542 p.,diagr.phot. 
<br/><br/>pp.508-610 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Subjects--Index Terms: </label>Photometry 
<br/><br/><label>Dewey Class. No.: </label>g8o2W18f6oo