1. Albert B. Cook III, Introduction to the English Language. Structure andHistory (New York, 1969), 174Cook174Introduction to the English Language. Structure and History1969
2. Horst Weinstock, 'Aspects of the Great Vowel Shift," in Medieval Stud-ies Conference Aachen 1983: Language and Literature (New York, 1984), 155WeinstockAspects of the Great Vowel Shift155Medieval Studies Conference Aachen 1983: Language and Literature1984
3. Janet Aiken, Why English Sounds Change (New York, 1929), 88Aiken88Why English Sounds Change1929
4. Stuart Robertson, The Development of Modern English (New York, 1934), 203Robertson203The Development of Modern English1934