Masechet Parah : Peirush Afikei Mayim

The Mishnah with the commentaries of Rav Hai Gaon, the Rambam, the Rash, the Rosh, and the Maharam of Rottenburg, corrected from manuscripts with notes.
Together with the double-commentary of Afikei Mayim which explains the Mishnayos in short and long format.