| Label | Vocabulary | Concept | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Telephone directories | LC Subject Headings (LCSH) |
Form Subdivision | sh99001772 | |
| Directories--Telephone | |||||
| 2. | Information services | LC Subject Headings (LCSH) |
General Subdivision | sh00006253 | |
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