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1. Disputed Boundaries: Brasil, 1950

1950. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile represents the disputed boundaries of Brazil in 1950. These data were created using a custom World Polyconic projection. Thi... Instituto Brasileiro de Geografia e Estatística.

2. Historical United States County Boundaries, 1950

1950. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1950. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

3. Municipal Boundaries: Brasil, 1950

1950. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile represents the municipal boundaries of Brazil in 1950. These data were created using a custom World Polyconic projection. Th... Instituto Brasileiro de Geografia e Estatística.

4. State Boundaries: Brasil, 1950

1950. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile contains the state boundaries of Brazil in 1950. These data were created using a custom World Polyconic projection. This lay... Instituto Brasileiro de Geografia e Estatística.