Columbia subject headings:
Dagestanian languages--Phonology, Comparative.
Dagestanian languages--Phonology, Historical.
Nakh languages--Phonology, Comparative.
Nakh languages--Phonology, Historical.
Harvard subject headings:
Dagestanian languages--Phonology, Comparative.
Dagestanian languages--Phonology, Historical.
Nakh languages--Phonology, Comparative.
Nakh languages--Phonology, Historical.
Princeton subject headings:
Caucasian languages--Phonetics.