2) Mishna. The Columbia Encyclopedia, Sixth Edition. 2001
...Oral Law-legal interpretations of portions of the biblical books of Exodus, Leviticus, Numbers, and Deuteronomy and other legal material. Together with the Gemara,...

3) Talmud. The Columbia Encyclopedia, Sixth Edition. 2001
...Oral Law with rabbinical elucidations, elaborations, and commentaries, in contradistinction to the Scriptures or Written Laws. The Talmud is the accepted authority...

4) Tannaim. The Columbia Encyclopedia, Sixth Edition. 2001
...Jewish sages of the period from Hillel to the compilation of the Mishna. They functioned as both scholars and teachers, educating those in the synagogues as well...