Wurm, Stephen A.. <br/><br/>
Prospects of Language Preservation in the North. 

 - Osaka-JA :   National Museum of Ethnology,   1997. 
 - p. 35-53 
 - Irregular 
 - No. 44, (1997) 
 - Senri Ethnological Studies ;   no. 44 .
 - Japón.   National Museum of Ethnology. .
<br/><br/> Northern Minority Languages. Problems of Survival. 
<br/><br/><br/>Art¡culo en inglés.