Columbia subject headings:
Harvard subject headings:
Mishnah. Avot--Commentaries.
Volozhiner, Ḥayyim ben Isaac, 1749-1821
Princeton subject headings:
Jewish ethics.
Mishnah. Avot--Criticism, interpretation, etc.
Volozhiner, Ḥayyim ben Isaac, 1749-1821. Ruaḥ ḥayim.