Bergmann, Peter G. <br/><br/>
The riddle of gravitation 
<label>/ by </label> Bergmann, Peter G. 
 - New York  Charles Scribner's Sons  1968 
 - xvi, 270p.  ill.  24 cm. 
<br/><br/><label>Dewey Class. No.: </label>530.11  / BER