An Act: To amend Sections 1 and 2 of Act No. 100 of June 27, 1956 Act No. 81 of August 30, 1991: Autonomous Municipalities Act of the Commonwealth of Puerto Rico. In An Act: To amend Sections 1 and 2 of Act No. 100 of June 27, 1956, Act No. 66, 3rd Session of the 13th Legislature of Puerto Rico. April 14, 1998. Retrieved November 22, 2009.
Ponce. Proyecto Salon Hogar. Map of Barrios of Ponce. (Map with fully urbanized barrios conglomerated and merged as "Zona Urbana". Barrio not labeled is named "Machuelo Abajo".) Retrieved November 30, 2009.