Beem, J.K., et al <br/><br/>
Global iorentzian geometry 
J.K. Beem, et al 
 - 2 
 - New York  Marcel Dekker  1996 
 - xiv  635 
 - Monographs & textbooks in pure & applied mathematics 202 .
<br/><br/><label>ISBN: </label>0-8247-9324-2 
<br/><br/><label>Dewey Class. No.: </label>8.07+13.06  / BEEM