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...
Curated OER
Etc: Maps Etc: Economic and Commercial Activity in the Philippine Islands, 1920
A map from 1920 of the Philippine Islands showing the principal commercial products in the region, with the products named in red. The map shows major cities and chief seaports, railroads, navigable rivers, islands and coastal features....