Population (3) Employment (2) Variation (2) Genetics (2) Couples (2) Event history analysis (2) Worms (2) Urbanization (2) Twentieth century (2) North (The word) (2) Impact (2) Consanguinity (2) Cities and towns (2) 20th century (2) Movements (2) History--20th century (2) Occupations (2) Migrations (2) Emigration and immigration (2) Urbanización (2) Emigración e inmigración (2) Consanguinidad (2) Genética (2) Trabajo (2) Collectivité territoriale (2) Bassin (2) Voie urbaine (2) Urbanisation (2) Travail (2) Population (2)