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