“SWAZI VOCAL MUSIC. David Rycroft. No. 1 of Series of African Music Musee Royal De L’Afrique Centrale, Tervuren and the Belgishe Radio En Televisie.”. 1969. African Music: Journal of the International Library of African Music 4 (3), 103. https://doi.org/https://doi.org/10.21504/amj.v4i3.1449.