Kropotkin Prince Peter <br/><br/>
Mutual aid    A factor of evolution 

 -  1939 
<br/><br/><label>Standard No.: </label>65851 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>POLITICAL SCIENCE
<br/><br/><label>Dewey Class. No.: </label>WxM42:1, G9-;1