Howgrave-Graham, R. P. . <br/><br/>
X-Rays: Simply Explained /  Textual Documents 
R. P. Howgrave-Graham. 
 - 1st ed. / 
 - London :  Percival Marshall & Co. ,  Nd. 
 - 93p. ;  12 cm.. 
<br/><br/><label>Subjects--Index Terms: </label>T/G-Physics Physics-Xrays 
<br/><br/><label>Dewey Class. No.: </label>537.53  / H 839 X