The Gemara discusses (22a)if there are 3 or 4 aliyot on a Ta'anit Tzibur: but where do we learn that there is a mitzvah to read the Torah on a Ta'anit Tzibur at all? Granted, the Gem assumes (29a) that this is the case and a baraita on 22b mentions it but is there a Mishnaic source?
Marc Chipkin, Johannesburg, South Africa
The source is the Mishnah at the end of the fourth Perek, which says, "b'Ta'aniyos b'Berachos
u'Klalos." See the Rosh there.
D. Zupnik