Mishnah Tractate Rosh Hashanah with the Commentary of Rabbi Ovadiah MiBartinura
Appendix. Shevilei de’Rakiya, an introduction to the principles of Rabbinical Astronomy
Kuntres Magid Ha’rakia by Dr. Jeffry R. Cohen.
Tiferes Yisrael R. Israel Lifschitz, Shevilei de’Rakiya,
