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Subjects
- UNICEF.1
- USSR36
- Uganda4
- Ukraine1
- Ultracentrifugation3
- Ultraviolet Rays2
- Uncertainty1
- Uncompensated Care3
- Uncompensated Care -- economics4
- Uncompensated Care -- history1
- Uncompensated Care -- statistics & numerical data2
- Underhill, Lilian A., 1885-1977.1
- Undocumented Immigrants5
- Undocumented Immigrants -- legislation & jurisprudence2
- Undocumented Immigrants -- statistics & numerical data1
- Unemployment15
- Unemployment -- statistics & numerical data10
- Unemployment -- trends1
- Union Pacific Railroad Company.1
- United Arab Emirates1