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| Polytechnic University of Puerto Rico--Graduate students--Posters (2) |
| Polytechnic University of Puerto Rico--Graduate students--Research (2) |
| Drone aircraft in remote sensing (1) |
| Forest conservation (1) |
| Forestry and community (1) |
| Forests and forestry--Puerto Rico (1) |
| Topographical surveying (1) |
| Urban forestry (1) |