1. Geographic relations of landslide distribution and assessment of landslide hazards in the Blanco, Cibuco, and Coamo basins, Puerto Rico Author/Creator: Larsen, Matthew C., author Publication/Creation: San Juan, Puerto Rico : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
2. Censuses of population and housing in Puerto Rico, 1960 : processing the data Author/Creator: United States. Bureau of the Census Publication/Creation: [Washington] : [For sale by the Superintendent of Documents. U. S. Govt. Print. Off], [1963] Resource Type: Book Access & Availability: Loading
3. Puerto Rico census of business, 1954 : retail, wholesale, and selected service trades Author/Creator: United States. Bureau of the Census Publication/Creation: Washington : U.S. Govt. Print. Off, 1956 Resource Type: Book Access & Availability: Loading