Cass, I. G. <br/><br/>
Crystals and optical properties  introduction to mapwork /  [motion picture] : 
Speakers: I. G. Cass, J. B. Wright & R. C. I. Wilson 
 - Milton Keynes :  Open University,  1973 
 - 1 film reel (24 min.) :  sd., b&w. ;  16 mm. + notes 
<br/><br/> backup in U-matic 
<br/><br/>pt.1. The relationship between crystal symmetry, internal structure & optical properties - pt.2. Dependence of optical properties upon orientation of thin section. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crystal optics<br/>Crystals--Optical properties