Johns, Harold Elford. <br/><br/>
The physics of radiology / 
Harold Elford Johns and John Robert Cunningham. 
 - 4th ed. 
 - Springfield :  Charles C. Thomas,  1983. 
 - xix, 796 p. :  ill. ;  26 cm. 
<br/><br/> Includes indexes. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0398046697 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radiology, Medical.<br/>Radiology.<br/>Health physics.