Columbia subject headings:
Harvard subject headings:
Japanese language--Heian period, 794-1185--Grammar.
Japanese language--Middle Japanese, 1185-1600--Grammar.
Japanese language--To 794--Grammar.
Princeton subject headings:
Japanese language--Heian period, 794-1185--Grammar.
Japanese language--Middle Japanese, 1185-1600--Grammar.
Japanese language--To 794--Grammar.