| Label | Vocabulary | Concept | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Environmental aspects | LC Subject Headings (LCSH) |
General Subdivision | sh99005383 | |
| 2. | Equipment and supplies | LC Subject Headings (LCSH) |
General Subdivision | sh00005850 | |
| Supplies ; Apparatus and supplies ; Apparatus ; Apparatus and equipment | |||||
| 3. | Law and legislation | LC Subject Headings (LCSH) |
General Subdivision | sh99004848 | |
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