Hoppin, Richard H. Medieval music / Richard H. Hoppin. - 1st ed. - New York : W. W. Norton, c1978. - xxiii, 566 p. : ill. ; 24 cm. - The Norton introduction to music history . Includes index. Bibliography: p. [531]-551. ISBN: 0393090906 LCCN: 78007010 /MN/r98 Subjects--Topical Terms: Music--History and criticism.--500-1400 LC Class. No.: ML 172 / .H8