Subject
- Bulletin (United States. Bureau of Forestry)1
- Forest reserves -- Puerto Rico -- Luquillo Experimental Forest1
- Herbivores -- Puerto Rico -- Luquillo Experimental Forest1
- Luquillo Experimental Forest (P.R.)1
- Nutrient cycles -- Puerto Rico -- Luquillo Experimental Forest1
- Rain forest ecology -- Puerto Rico -- Luquillo Experimental Forest1
- Soil ecology -- Puerto Rico -- Luquillo Experimental Forest1