Le Bon, Gustave,  Dr.,  1841-1931 <br/><br/>
The evolution of forces / 
by Gustave Le Bon 
 - London :  Kegan Paul, Trench, Trubner,  1908 
 - xv, 388, 8 p. ;  20 cm. 
 - The international scientific series .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Force and energy<br/>Phosphorescence<br/>Radioactivity
<br/><br/><label>Dewey Class. No.: </label>530.1