1931:
https://prpop.org/biografias/ismael-rivera/
https://elpozodelasalsa.com/biografias/biografia-de-ismael-rivera-maelo/
http://www.americasalsa.com/biografias/ismael_rivera.html
http://umbral.uprrp.edu/wp-content/uploads/2019/03/Daniel-Nina-Umbral-14.pdf
puerto-rico-salsa-noticia-12-05-2017/
https://www.youtube.com/watch?v=dVXVkFqmZuk&list=LLmB6D6tP14y2QOHoCA786fw&index=2093