Scale not given (W 117°06ʹ00ʺ--W 116°26ʹ00ʺ/N 46°00ʹ00ʺ--N 45°03ʹ00ʺ).
Note
Relief shown by hachures and spot heights. Publication date inferred from date in the call number of local copy. Text titled "Facts," table of "Hells Canyon National Recreation Area Acreages," mailing area, and illustrations on verso.