Tracey, Hugh. FOLK AND TRADITIONAL MUSIC OF THE WESTERN CONTINENTS by Bruno Nettl. Prentice-Hall, History of Music Series, Englewood Cliffs, New Jersey, revised edition 1973 (original edition 1965). 1973. International Library of African Music. Africa Multiple Interactive Research Atlas (AMIRA). https://doi.org/10.21504/amj.v5i3.1667.