Columbia subject headings:
Slavic languages, Southern--Consonants.
Slavic languages, Southern--Dialects--Phonology.
Slavic languages, Southern--Phonology, Comparative.
Slavic languages, Southern--Phonology, Historical.
Harvard subject headings:
Princeton subject headings:
Slavic languages, Southern--Dialects.
Slavic languages, Southern--Syllabication.
Slavic languages, Southern--Vowels.