Columbia subject headings:
Bulgaro-Turkic language--Consonants.
Bulgaro-Turkic language--Vowels.
Chuvash language--Foreign words and phrases.
Chuvash language--Grammar.
Chuvash language--Phonetics.
Historical linguistics.
Harvard subject headings:
Bulgaro-Turkic language--Consonants.
Bulgaro-Turkic language--Vowels.
Chuvash language--Foreign words and phrases
Chuvash language--Grammar.
Chuvash language--Phonetics.
Historical linguistics.
Princeton subject headings:
Bulgaro-Turkic language--Consonants.
Bulgaro-Turkic language--Vowels.
Chuvash language--Foreign words and phrases.
Chuvash language--Grammar.
Chuvash language--Phonetics.
Historical linguistics.