Kropotkin, P'etr Alekseevich, kniaz,   1842-1921. <br/><br/>
Mutual aid :  a factor of evolution / 
by P. Kropotkin ; with a foreword by H. L. Beales. 
 - Harmondsworth :  Penguin Books Ltd. ,   1939. 
 - 278 p.  ;   19 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cooperation.<br/>Social  groups.<br/>Sociology.
<br/><br/><label>Dewey Class. No.: </label>301