3Hood, M.The Challenge of Bi-Musicality.Ethnomusicology, 1960(4) . 55-59.
4Cooley, Timothy J. 1997.Casting Shadows in the Field. An Introduction, Shadows in the Field. New Pespectives for Fieldwork in Ethnomusicology, edited by Gregory E. Barz & Timothy J. Cooley. New York. Oxford University Press, pp.3-22.