1. Age-Grading and Linguistic Continuity;Hockett;Language,1950
2. Sociologic Notes on Obsolescent Languages;Swadesh;International Journal of American Linguistics (IJAL),1948
3. Sociologic Notes on Obsolescent Languages;Swadesh;International Journal of American Linguistics (IJAL),1948
4. Hands Off Pidgin English!;Hall,1955
5. Chinook Jargon;Grant;IJAL,1945