Curated OER
Etc: Maps Etc: Forest Areas of the United States, 1901
A map from 1901 of the United States showing the principal forest regions. The map is color-coded to show heavily forested areas and areas where forests occur in more or less open areas.
Curated OER
Etc: Maps Etc: United States Economic Regions, 1900
A map from 1912 of the United States showing the principal industries of the region. The map is color-coded to show the areas of fishing grounds, industrial centers, coal mining areas, petroleum fields, and iron ore fields. This map...