Columbia subject headings:
Udmurt language--Grammar.
Harvard subject headings:
Udmurt language--Grammar.
Udmurt language--Morphology.
Udmurt language--Morphosyntax.
Udmurt language--Phonology.
Udmurt language--Syntax.
Princeton subject headings:
Udmurt language--Grammar.
Udmurt language--Morphology.
Udmurt language--Morphosyntax.
Udmurt language--Phonology.
Udmurt language--Syntax.