Koyama, Ken'ichi,   1933-1997  <br/><br/>
Rekishi ga tenkan suru toki / 
Ken'ichi Koyama. 
 - Tokyo :  PHP Kenkyujo,  1992. 
 - 243 p. ;  20 cm.  
<br/><br/><label>ISBN: </label>4569535852  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Japón
<br/><br/><label>Dewey Class. No.: </label>312