Lisäpainokset: 2. ed. 1965, 3. ed. 1978.
Preface to the second edition. The chief innovation in this edition is the replacement of the map of the Dialects of the Eastern United States on p. 124 by a reproduction of the map of the Speech areas of the Eastern United States from Hans Kurath's "A word geography of the Eastern United States".
Preface to the third edition. In this edition I have made a number of minor corrections and revised the Select Bibliography.