Chadwick, James,  1891- <br/><br/>
Radioactivity and radioactive substances / 
J. Chadwick ; With foreword by Lord Rutherford.  Rev. and supplemented by J. Rotblat. 
 - 4th ed. 
 - London :  Pitman,  [1953] 
 - 120 p. :  illus. ;  19 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radioactivity.
<br/><br/><label>Dewey Class. No.: </label>539.752  / CHR