| Label | Dataset | Type | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Inspection |
LC Subject Headings (LCSH) |
Topic SimpleType Authority |
General Subdivision | sh00006257 |
| 2. | Environmental aspects |
LC Subject Headings (LCSH) |
Topic SimpleType Authority |
General Subdivision | sh99005383 |
| 3. | Transportation |
LC Subject Headings (LCSH) |
Topic SimpleType Authority |
General Subdivision | sh2001008994 |
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