Bernal J D <br/><br/>
Freedom of necessity 
Bernal J D 
 -  1949 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural Science
<br/><br/><label>Dewey Class. No.: </label>AoY, H9