Columbia subject headings:
Harvard subject headings:
Chinese language--Phonology.
Korean language--Middle Korean, 935-1500--Phonology.
Meng-ku yün lüeh.
Sin, Suk-chu, 1417-1475. Sasŏng tʻonggo.
Princeton subject headings:
'Phags-pa alphabet.
Chinese language--Phonology.
Korean language--Middle Korean, 935-1500--Phonology.
Menggu yun lüe.
Sin, Suk-chu, 1417-1475. Sasŏng t'onggo.