What's happening to American English?

What's happening to American English?

Manylion Llyfryddiaeth
Prif Awdur: Tibbetts, A. M.
Awduron Eraill: Tibbetts, Charlene (joint author.)
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: New York Scribner c1978.
Pynciau:
English language > United States.
English language > Study and teaching (Secondary) > United States.
English language > United States > Grammar.