Nida, Eugene. <br/><br/>
Field techniques in descriptive linguistics. 

 - Estados Unidos-US :   International journal of American Linguistics,   1947. 
 - páginas 138-146 
 - Irregular 
 - Vol.13, no.3 (Jul. 1947) 
 - International journal of American Linguistics. Separata ;   no.3 .
 - International journal of American Linguistics. .