Columbia subject headings:
Harvard subject headings:
Communication models--Evaluation.
Communication models--Research.
Competence and performance (Linguistics)--Research.
Ecolinguistics--Research.
Interdisciplinary approach in education--Research.
Princeton subject headings:
Communication models--Evaluation.
Communication models--Research.
Competence and performance (Linguistics)--Research.
Ecolinguistics--Research.
Interdisciplinary approach in education--Research.