Curated OER
Etc: Maps Etc: Puerto Rico and Neighboring Islands, 1916
A map from 1916 of Puerto Rico, St. Thomas, St. Croix, and St. John showing terrain and coastal features, rivers, principal cities, towns, and ports, and railroads. The map uses color-contouring to show land elevations from sea level to...
Curated OER
Educational Technology Clearinghouse: Maps Etc: North America, 1916
A map from 1916 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing land elevations, water depths, and isothermal lines of mean temperatures for January and July. The map uses color-contouring to show...