Música de Javi Álvarez.
Imágenes:
How the Ear Functions, 1940 archive.org/details/HowtheEa1940
How the Eye Functions, 1941 archive.org/details/HowtheEy1941
The Eyes and Their Care (An Introduction), 1941 archive.org/details/EyesandT1941
Medialab-Matadero Madrid