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U*X*L Encyclopedia of Landforms and Other Geologic Features (Reference Book Online)

Focuses on the physical and geological aspects, structure, and features of 48 of the earth's landforms - what they are, how they look, how they were created, how they change over time, and major geological events associated with them. Written for middle school students to support earth science and landform-related assignments, alphabetically arranged entries follow a standard and consistent subheaded format; range in length from 9 to 11 pages; and cover common and unusual landforms such as archipelago, estuary, isthmus, tributary, and many more.

U.S. Government Online (General Database)

Presents in-depth information on the structure, function and history of the U.S. government and its everyday role in the lives of citizens.

Uniform Crime Reports (Website)

Summarizes crime statistics in the United States and is published by the FBI. Includes the publications: Crime in the United States, Hate Crime Statistics, Law Enforcement Officers Killed and Assaulted.