United States. Soil Conservation Service - Geological Survey (U.S.)
Grand Canyon National Park and vicinity, Arizona : 1962
Grand Canyon National Park and vicinity, Ariz.
Relief shown by contours and spot heights. "Compiled in 1967 from 1:62,000-scale maps dated 1954 and 1962 and by photogrammetric methods from aerial photographs taken 1951, 1954, 1958, and 1960." "Supersedes map dated 1923." Available also through the Library of Congress Web site as a raster image. "N3600--W11145/28/60."