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Polytechnic University of Puerto Rico--Faculty--Research (3) |
Polytechnic University of Puerto Rico--Graduate students--Research (3) |
Construction projects (1) |
Puerto Rico Departamento de Transportación y Obras Públicas Autoridad de Carreteras (1) |
Rivers--Panama (1) |
Río Grande River (Panama) (1) |
Soils--Panama (1) |
Trenchless construction (1) |
Tunneling--Equipment and supplies (1) |