Ushijima, Iwao. <br/><br/>
Political Structure and Formation of Communication Channels on Yap Island :   A Case Study of the Fanif District. 

 - Osaka-JA :   National Museum of Ethnology,   1987. 
 - p. 177-203 
 - Irregular 
 - No. 21, (1987) 
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<br/><br/> Chapter III : Socio-Cultural Aspects of Chieftainship.  Cultural Uniformity and Diversity in Micronesia. 
<br/><br/><br/>Art¡culo en inglés.