Genizah MS T-S AS 144.150
Chapter from a calendrical work entitled 'Chapter on Ordinary Years' giving dates of New Moons, fasts and holidays. Mentions a mnemonic משה דרעי and states that there are 7 (sic!) ordinary years.
Taylor-Schechter Genizah Research Unit
Sponsored by the Jewish Manuscript Preservation Society, the Friedberg Genizah Project Inc., and the Arts and Humanities Research Council, UK