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  • Electric power transmission: 1974.

    Scale 1:7,500,000. Title in upper margin: Electric power transmission. "Albers equal area projection." "This map is ... published for the Committees on Commerce and Interior and Insular Affairs of the U.S. Senate ...

    • Contributor: Geological Survey (U.S.)
    • Original Format: Maps
    • Date: 1976
  • [United States-including cities and administrative divisions] 4-75.

    Scale 1:7,500,000. Title from: Reference aid, unclassified CIA maps ... "Albers equal area projection." "517607." Includes insets of Hawaii and Alaska. Available also through the Library of Congress Web site as a ...

    • Contributor: United States. Central Intelligence Agency
    • Original Format: Maps
    • Date: 1975
  • Interrelationship of educational attainment and per capita income.

    Scale not given. Includes text. Available also through the Library of Congress Web site as a raster image. col. map 25 x 38 cm.

    • Contributor: United States. Bureau of the Census
    • Original Format: Maps
    • Date: 1970
  • Color image map : [ports of entry, United States-Canadian border] /

    Scale 1:25,000. Each sheet separately titled. "Projection and 1000-meter grid: Universal Transverse Mercator." "Photoimagery rectified by optical scanning of simultaneously exposed B/W panchromatic and B/W infrared 1:70,000 scale aerial photographs taken October ...

    • Contributor: Geological Survey (U.S.)
    • Original Format: Maps
    • Date: 1978