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 - Osaka-JA :   National Museum of Ethnology,   2000. 
 - p. 117-141 
 - Irregular 
 - No. 52, (2000) 
 - Senri Ethnological Studies ;   no. 52 .
 - Japón.   National Museum of Ethnology. .
<br/><br/> Japanese Civilization in the Modern World. XIV. Information and Communication.