Penrose, Roger.  1931- <br/><br/>
Spinors and space-time,  vol. 2.  spinor and twistor methods in space-time geometry. 

 - Cambridge, UK:  Cambridge University Press,  1986. 
 - ix, 501 p.: 
 - Cambridge monographs on mathematical physics. .
<br/><br/><label>ISBN: </label>0521252679 
<br/><br/><label>Dewey Class. No.: </label>515.63  / P417s