Relief shown by contours and spot heights. "Contour interval 200 feet with supplementary contours at 100 foot intervals." "Base from U.S. Geological Survey 1:250,000 Millet, 1955; Wells, 1955; Ely, 1956; Elko, 1955; McDermitt, 1955; Winnemucca, 1955." "First edition, second printing, 1984." Date on envelope: 1984. Location map on envelope. Includes location map, declination diagram, and indexed source diagram.