Global Lorentzian geometry 
John K. Beem, Paul E. Ehrlich 
 - 2nd revised ed 
 - New Jersey  [publisher not identified]  1996 
 - xiv, 634 p. ;26 cm 
<br/><br/> Includes bibliography reference and index 
<br/><br/><label>ISBN: </label>9780824793241 
<br/><br/><label>Dewey Class. No.: </label>516.37 BEE