| Labor -- United States -- Social conditions -- 20th century. Matches 1 item |
| Labor -- United States -- Statistics. Matches 1 item |
| Labor -- Washington (D.C.) -- Case studies. Matches 1 item |
| Laboratories. Matches 1 item |
| Laboratories -- Curricula -- United States. Matches 1 item |
| Laboratories -- Juvenile fiction. Matches 2 items |
| Laboratories -- New York (State) -- Ithaca. Matches 1 item |
| Laboratories -- Sociological aspects. Matches 1 item |
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Laboratories, Writing -- United States -- Administration. SEE: Writing centers -- United States -- Administration Matches 1 item
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Laboratory animals. Matches 2 items See Also: Animal experimentation. Matches 4 items
See Also: Primates as laboratory animals. Matches 1 item
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