Bernal, J D <br/><br/>
Freedom of necessity / 
by J D Bernal 
 - London :  Routledge & K. Paul,  1949. 
 - 437p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science<br/>Social sciences.
<br/><br/><label>Dewey Class. No.: </label>504  / BER.F