"Forest Service map class A."
Relief shown by hachures and spot heights.
"Base material prepared in the Regional Office USDA Forest Service, Missoula, Montana 59807 from USFS planimentric maps and US Geological Survey topographic maps. Reformatted and updated in 1979 by USFS Geometronics Service Center."
"Principal meridian."
"Universal Transverse Mercator zone 12, 10,000 meters grid."
Includes key map, source diagram, "Index to Geological Survey topographic maps," and index.
Includes separate index on verso.