©
U.S. National Archives: Squatters' Community ..., 04/1972
©
U.S. National Archives: Martin-Pena Area of Puerto Rico ..., 04/1972
©
U.S. National Archives: Martin-Pena Area of Puerto Rico ..., 04/1972
©
U.S. National Archives: Martin-Pena Area of Puerto Rico ..., 04/1972
©
U.S. National Archives: Martin-Pena Area of Puerto Rico ..., 04/1972
©
U.S. National Archives: Martin-Pena Area of Puerto Rico ..., 04/1972
©
U.S. National Archives: Martin-Pena Area of Puerto Rico ..., 04/1972
©
U.S. National Archives: The Martin-Pena Area of Puerto Rico ..., 04/1972