Segal,Irving Ezra. <br/><br/>
Mathematical cosmology and extragalactic astronomy   
by Irving Ezra Segal 
 - New york  Academic Press  1976 
 - ix, 204p. 
 - Pure and applied mathematics .
<br/><br/><label>ISBN: </label>012635250X 
<br/><br/><label>Dewey Class. No.: </label>523.12  / N75