Egan, Walter G. <br/><br/>
Optical properties of inhomogeneous materials :  applications to geology, astronomy, chemistry, and engineering / 
[by] Walter G. Egan and Theodore W. Hilgeman. 
 - New York :  Academic Press,  1979. 
 - xi, 235 p :  ill. 
<br/><br/><label>ISBN: </label>0122326504 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inhomogeneous materials--Optical properties.