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- Turismo-El Salvador 1
- Turismo-España-Baleares (Islas) 1
- Turismo-México 1
- Tutela Legal del Arzobispado de San Salvador 2
- Typhoid fever 1
- Ubico Urruela, Arturo, 1848-1927 3
- Ubico, Arturo 2
- Ubico, Jorge, 1878-1946 6
- Ugarte, Manuel 1
- Ultra-violet rays 1
- Ultra-violet rays-Physiological effect 1
- Ultra-violet rays-Protection 1
- Unamuno, Miguel de, 1864-1936 1
- Unated States-History 1
- Uncertainty-United States 1
- Underdeveloped areas 4
- Underdeveloped areas-Economic conditions 1
- Underdeveloped areas-Social conditions 1
- Underdevelopment 14
- Underemployment 1