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Institution
Collection
Format
Subject
22
Puerto Rico Politics and government
15
Self-determination, National
12
Statehood (American politics)
10
Puerto Rico Relations
10
United States Relations
8
Referendum
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6
Groundwater
5
Water-supply
4
Groundwater flow Mathematical models
4
Land titles Registration and transfer
4
Older people Services for
4
Plebiscite
4
Water quality
3
Borings
3
El Yunque National Forest (P.R.)
3
Flood control
3
Flood damage prevention
3
Forest reserves Law and legislation
3
Hydrogeology
3
Mines and mineral resources
3
Puerto Rico Foreign relations
3
Sedimentation and deposition
3
United States Foreign relations
2
Aquifers
2
Channels (Hydraulic engineering)
2
Clemency Political aspects
2
Debts, Public
2
Democracy
2
Drug control
2
Drug traffic
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Author
45
Geological Survey (U.S.)
10
United States. Congress. House. Committee on Resources
9
United States. Administration on Aging
8
Puerto Rico. Department of Natural Resources
6
Quiñones, F.
6
United States. Congress. Senate. Committee on Energy and Natural Resources
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5
Puerto Rico. Oficina del Gobernador para Asuntos de la Vejez
4
Puerto Rico Industrial Development Company
4
United States. Congress. House. Committee on Rules
4
United States. Congress. House. Committee on Transportation and Infrastructure
4
United States. Soil Conservation Service
3
Luepke, Gretchen
3
Poppe, Lawrence J.
3
Rodríguez-Martínez, Jesús
3
Southern Forest Experiment Station (New Orleans, La.)
3
United States. Congress. House. Committee on Government Reform
3
United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Insular and International Affairs
3
United States. Office of Educational Research and Improvement
3
United States. Office of the Assistant Secretary of the Army (Civil Works)
2
Green, Bruce
2
Gómez-Gómez, Fernando
2
Nelson, H. E. 1929-2011
2
Newton, Anne E.
2
Perez de Gonzalez, Ileana
2
Pierce, H. A. 1951-
2
Puerto Rico Aqueduct and Sewer Authority
2
Puerto Rico. Department of Agriculture
2
Puerto Rico. Department of Natural and Environmental Resources
2
Regional Laboratory for Educational Improvement of the Northeast & Islands
2
Renken, Robert A.
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Language
Genre
Literary Form
Region
Puerto Rico
33
United States
10
United States Virgin Islands
3
El Yunque National Forest (P.R.)
3
San Juan
3
Vieques Island
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2
Barceloneta
2
Caribbean Area
2
Ponce
1
California
1
Canóvanas Region
1
Colorado
1
Cuba
1
Culebra Island
1
Guam
1
Guanajibo River
1
Guanajibo River (P.R.)
1
Guanajibo River Valley
1
Humacao Region
1
Luquillo Mountains
1
Manatí River
1
Manatí River (P.R.)
1
Mayagüez
1
Mayagüez Bay
1
Naguabo Region
1
Northeastern States
1
Rio Grande De Loiza Watershed
1
Salinas
1
Vega Alta
1
Vega Alta Region
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Call Number
Year of Publication