Aspden, Harold <br/><br/>
Gravitation / 
Harold Aspden 
 - Southampton :  Sabberton Publications,  1975 
 - 78 p. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0850560055 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gravitation