@Misc{BVMC:615425, author = {Río, Alberto del}, title = {The villancico in the works of early Castilian playwrights (with a note on the function and performance of the musical parts)}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2014}, year = {2014}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc515r6} }