Photoplanes of the historical flight of the Ebro Basin 1927

Black and white 1:10,000 scale photoplanes of the historical flight of the Ebro Hydrographic Trade Union Confederation of 1927. They are a total of 655 photoplanes distributed in 49 sheets of MTN 1:50,000 totally or partially covered by them, covering approximately 13,422 km2 of area (15.6% of the territory of the Ebro river basin district).