Columbia subject headings:
English language--Grammar, Generative.
English language--Middle English, 1100-1500--Vowels.
English language--Phonology, Historical.
Linguistic change.
Harvard subject headings:
English language--Grammar, Generative
English language--Middle English, 1100-1500--Vowels.
English language--Phonology, Historical
Linguistic change.
Princeton subject headings:
English language--Grammar, Generative.
English language--Middle English, 1100-1500--Vowels.
English language--Phonology, Historical.
Linguistic change.