Howlett, Derq. "A translation of three treatises by Martin Agricola--Musica Choralis Deudsch, Musica Figuralis Deudsch, and Von Den Proporcionibus--with introduction, transcriptions of the music, and commentary /." Doctoral dissertation, Ohio State University, 1979. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487089582134818Chicago Manual of Style (17th edition)