Brazilian Music Archives Selection of manuscripts from the Mariana Museum of Music, including rare compositions of religious music from the 17th to 20th centuries, composed mainly by lesser known Brazilian artists. Read about the pieces and view facsimiles of each page. http://www.mmmariana.com.br/
Digital Image Archive of Medieval Music Archive of Early and Medieval music manuscripts and scores. Hundreds of scanned images available, with higher resolution ones for members. http://www.diamm.ac.uk/
Doctoral Dissertations in Musicology-Online The site presents an index to dissertations-in-progress and a bibliography of completed dissertations reported since mid-1995, arranged under the traditional broad categories. http://www.music.indiana.edu/ddm/
The Keys of Atlantis Chapter 1 of this book by Peter Wakefield Sault, that is concerned with the mathematical derivations of the western system of music, the Babylonian unit of rotation and the minute of time. http://www.odeion.org/atlantis/