Douglas Mary <br/><br/>
Natural symbols    Explorations in cosmology    

 - Harmondsworth  Penguin Books           1973 
 - 219p  cm. 
 - Pelican Books .
<br/><br/> Bibliography: P202-208 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:38, L3