Symposium of institute of mathematical science(3  Madras,1965) <br/><br/>
Symposia on theoretical physics  V.5 
ed. by Alladi Ramakrishnan 
 - New york  Plenum Press  1967 
 - xiii, 161p. 
<br/><br/><label>Dewey Class. No.: </label>530.106  / N66.5