2003. United States. Environmental Protection Agency. This polygon shapefile shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of... National Atlas of the United States.
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1876. Geographical Surveys West of the 100th Meridian (U.S.). Relief shown by hachures and spot heights.; "Atlas sheet no. 83."; "Issued Mar. 18th 1876."; "Expeditions of 1871 & 1873 under the command of 1st. ... U.S. Geographical Surveys West of the 100th Meridian (Washington, D.C).
1924. Geological Survey (U.S.). Relief shown by contours and spot heights.; Index map on each sheet. each sheet 54 x 69 centimeters or smaller Scale 1:31,680 General Map Collection. The Survey (Washington, D.C).
1927. Geological Survey (U.S.). Relief shown by contours and spot heights.; Each sheet includes "Key map of plan sheets."; "Printed in 1927."; "19 plans, 1 profile sheet." on shee... U.S. Geological Survey (Washington).
1927. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Surveyed in 1926."; Index map on each sheet. 46 x 63 centimeters + Scale 1:31,680 General Map Collection. The Survey.
2010. Geological Survey (U.S.). This polygon shapefile portrays the Public Land Surveys of the United States, including areas of private survey, donation land claims, and land gra... Geological Survey (U.S.).
1888. Dahl, James, former owner and Rand McNally and Company. Relief shown by hachures and spot heights. Prime meridians: Greenwich and Washington. Shows roads, railroads, county and township divisions. Listed...
1922. Bryan, Kirk, 1888-1950. From: Water-supply paper 490, pl. 20-22. 95 x 70 centimeters or smaller Scale 1:250,000 General Map Collection. U.S. Geological Survey (Washington, D.C).
1922. Bryan, Kirk, 1888-1950. From: Water-supply paper 499, pl. 2-4. 95 x 70 centimeters or smaller Scale 1:250,000 General Map Collection. U.S. Geological Survey (Washington, D.C).
1985. 1 map : col. ; 43 x 49 cm Added title lower right: Highway system map : Salt River Indian Agency, Arizona. Relief indicated by hachures.