Straford, John <br/><br/>
X-rays and energy levels  [videorecording] / 
produced by John Straford 
 - England :  The Open University,  [n.d.] 
 - 1 videocassette (U-Matic) (24 min.) :  sd., col., ;  3/4 in. 
 - X-rays and energy levels [videorecording] .
<br/><br/>Speakers: Stuart Freake, Graham Farmelo 
<br/><br/><label>Subjects--Topical Terms: </label><br/>X-rays<br/>Quantum theory