Henning, H. B. <br/><br/>
Phase contrast imaging systems for enhancing linearity suppressing background-bleaching effects / 
H. B. Henning 
 - California :  Rand Corporation,  1972 
 - 28 pages ;  28 cm. 
 - The Rand paper series ;  p. 4931 .
 - Rand paper series ;  p. 4931 .
<br/><br/>Bibliography: p. 15.