Research (3) Investigación (3) Recherche (3) Recherche (3) technologie (3) recherche (3) Roumanie (2) Pologne (2) Département du Nord (2) Royaume-Uni (2) History (2) Traffic flow (2) Social history (2) Scientists (2) Research, Industrial (2) History, Modern (2) Economic history (2) Knowledge and learning (2) Transmission (2) Technology (2) Investigación industrial (2) Historia contemporánea (2) Historia moderna (2) Tráfico (2) Historia económica (2) Tecnología (2) Científicos (2) Historia (2) Technologie (2) Histoire sociale (2)