Gefvert, Constance J. Keys to American English by Constance Gefvert - New York Harcourt Brace Jovanovich 1975 - 389 p. : ill. ; 28 cm. Includes index. ISBN: 0155978586 LCCN: 75-1666 Subjects--Topical Terms: English language--Dialects--United StatesEnglish language--Grammar--1950