Aspectos ambientales, Contaminación, Proceso de datos, Contaminantes orgánicos en el agua, Fertilizantes nitrogenados, Riego, Fertirrigación, Olivos
Cuba, History, Influence, Political aspects, Epidemics, Liberalism, Portrayals, 1833 AD, 19th century AD, Historical research, Diseases, Cuba, Public opinion, Politics and government, Diseases - Cuba - Public opinion, Saco, José Antonio, Sagra, Ramón de la, Cuba - Politics and government - To 1898, To 1898, Diseases, Cuba, Public opinion, Politics and govern...