Fr. Jungmann's Study of the Roman Rite "Missarum Sollemnia" Available for Download

The indefatigable Jeffrey Ostrowski of Corpus Christi Watershed (does he ever sleep?) has posted over at Views from the Choir Loft the famous 2-volume study by Fr. Josef Jungmann, S.J., Missarum Sollemnia (published in English as The Mass of the Roman Rite: Its Origins and Development) for free download.  Check it out -- it's well worth adding to your collection.