Mapa topográfico de la primera república checoslovaca (1920-1938).
This file was derived from: Czechoslovakia1920-38.jpg
Sources of data:

Projection: EPSG3857
Topography: USGS  GMTED2010
Rivers, borders, lakes, cities (mainly): Natural Earth
Czechoslovakia1920-38.jpg: Mariusz Pazdziora (talk · contribs)
derivative work: Rowanwindwhistler (talk)