Mechanicville quadrangle, New York: mapped, edited, and published by the Geological Survey 1956

Shows portions of Saratoga, Rensselaer, and Washington Counties. Relief shown by contours and spot heights. “Topography from aerial photographs by stereophotogrammetric methods. Aerial photographs taken 1952. Field check 1954.” “Contour interval 10 feet.” “NW/4 Cohoes 15? quadrangle.” Includes quadrangle location map, metric conversion scale, and declination diagram. “M R-1161.”