Liber Usualis in modern notation

Just found this resource for a Liber Usualis in modern notation rather than the usual Gregorian notation. Pretty useful for those who are only familiar with modern musical notation. Do consider donating via Paypal to this elderly guy who took great pains in scanning up these pages, if you decide to print out these pages and use them in your singing. He has graciously provided yours truly with many pieces in SATB bourdon and fauxbourdon versions, too. I'd be most happy to send some of these to whoever is interested.