Watanabe H Ed. <br/><br/>
Human activity system 

 - Japan  University of Tokyo         1977 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>21745 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Y7:3z7, L7