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| Earthquake resistant design (3) |
| Polytechnic University of Puerto Rico--Graduate students--Research (3) |
| Buildings, Reinforced concrete--Earthquake effects (1) |
| Pipe--Design and construction (1) |
| Earthquake resistant design (3) |
| Polytechnic University of Puerto Rico--Graduate students--Research (3) |
| Buildings, Reinforced concrete--Earthquake effects (1) |
| Pipe--Design and construction (1) |