Penrose, Roger, <br/><br/>
Techniques of Differential Topology in Relativity : 

 -  SIAM,  1972. 
 - 76 pages 
<br/><br/><label>ISBN: </label>9780898710052 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology & Engineering.
<br/><br/><label>Dewey Class. No.: </label>530.11  / PEN