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1. 1:1,000,000-Scale County Boundaries of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands, by showing the counties as ar... Geological Survey (U.S.).

2. 1:1,000,000-Scale National Wilderness Preservation System of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile consists of National Wilderness Preservation System areas of 320 acres or more, in the United States, Puerto Rico, and the U... National Atlas of the United States.

3. 1:1,000,000-Scale State Boundaries of the United States, 2012

2012. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

4. 1:1,000,000-Scale State Boundaries of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

5. American Indian Reservations, Arizona, 1870

1870. University of Arizona. Library. Statewide coverage of 1870 American Indian Reservations. Reservation boundaries cross into the adjacent states. For example, the Navajo Nation cros... University of Arizona.

6. American Indian Reservations, Arizona, 1880

1880. University of Arizona. Library. Statewide coverage of 1880 American Indian Reservations. Reservation boundaries cross into the adjacent states. For example, the Navajo Nation cros... University of Arizona.

7. American Indian Reservations, Arizona, 1890

1890. University of Arizona. Library. Statewide coverage of 1890 American Indian Reservations. Reservation boundaries cross into the adjacent states. For example, the Navajo Nation cros... University of Arizona.

8. American Indian Reservations, Arizona, 1900

1900. University of Arizona. Library. Statewide coverage of 1900 American Indian Reservations. Reservation boundaries cross into the adjacent states. For example, the Navajo Nation cros... University of Arizona.

9. American Indian Reservations, Arizona, 1910

1910. University of Arizona. Library. Statewide coverage of 1910 American Indian Reservations. Boundaries that cross into the adjacent states are included. Population data is from the A... University of Arizona.

10. American Indian Reservations, Arizona, 1920

1920. University of Arizona. Library. Statewide coverage of 1920 American Indian Reservations. Boundaries that cross into the adjacent states are included. Population data is from the A... University of Arizona.