The library material is classified in ten main classes of the Dewey Decimal Classification and shelved accordingly.
Environment and Natural resources can be found under many classess, but is mainly under 333.7.
| 000 | Computer science, information and general works |
| 100 | Philosophy and psychology |
| 200 | Religion |
| 300 | Social sciences |
| 400 | Language |
| 500 | Natural science and mathematics |
| 600 | Technology (Applied science) - Medicine |
| 700 | Arts and recreation |
| 800 | Literature |
| 900 | History, geography and biography |
| 333.7 | Land, recreational and wilderness areas, energy |
| 333.701 | Natural resources - philosophy |
| 333.707 | Environmental studies |
| 333.7082 | Women - environment |
| 333.709 | Environmental geography |
| 333.71 | General topics of land, recreational and wilderness areas, energy |
| 333.72 | Conservation and protection |
| 333.73 | Land |
| 333.74 | Grasslands |
| 333.75 | Forest lands |
| 333.76 | Rural lands |
| 333.77 | Urban lands |
| 333.78 | Recreational and wilderness areas |
| 333.79 | Energy |
| 100 | Philosophy |
| 150 | Psychology |
| 155.9 | Environmental psychology |
| 179 | Environmental ethics |
| 300 | Social sciences |
| 304.2 | Human ecology |
| 310 | Statistical output |
| 311 | Political science |
| 333 | Resource economics |
| 333.7 | Environmental affairs |
| 333.714 | Environmental impact |
| 333.7 - 333.9 | Natural resources |
| 338 | Production economics |
| 338.1 | Agriculture |
| 338.3 | Fisheries management |
| 340 | Law |
| 344.046 | Environmental law |
| 346.043 | Ownership and transfer of natural resources |
| 350 | Public administration |
| 354.3 | Administration of environment and natural resources |
| 360 | Social problems and services |
| 363.7 | Environmental problems |
| 500 | Natural science and mathematics |
| 570 | Life science - Biology |
| 571 | Ecology |
| 620 | Engineering and allied operations |
| 620.8 | Ergonomics |
| 628 | Environmental protection engineering |
| 639 | Agriculture, fisheries |
| 639.9 | Conservation of nature |
| 650 | Management and auxiliary services |