Bernal, J.D. <br/><br/>
Science in history vol-iv   the social sciences: conclusion 

 - 3rd 
 - London<br/>  Penguin Book Publications  1969 
 - 1325p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/><Ideas of invention><br/>Natural Science and mathematics
<br/><br/><label>Dewey Class. No.: </label>509  / BER