Lecture -"The Indian Harp, the Rondador, and other self-made Ecuadorian instruments", undated

Lecture -"The Indian Harp, the Rondador, and other self-made Ecuadorian instruments", undated, Box: 4, Folder: 10. Johannes Riedel Papers, 1984-04. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/501909 Accessed September 26, 2026.