Columbia subject headings:
Harvard subject headings:
Indo-Aryan languages--Phonology.
Indo-European languages--Phonology.
Indo-Iranian languages--Phonology.
Laryngeals (Phonetics)
Princeton subject headings:
Indo-Aryan languages--Phonology.
Indo-European languages--Phonology.
Indo-Iranian languages--Phonology.
Laryngeals (Phonetics)