monde (3) puits (3) enquête (3) état (3) société (humaine) (3) papier (3) carte (3) analyse (3) Europe (3) distribution (3) méthode (3) Europe (3) Development (3) Selection (3) Correspondence (3) Scenarios (3) Correspondence (3) Societies (3) Scenarios (3) Plots (Drama, novel, etc.) (3) Persons (3) Paper (3) Motion picture plays (3) Matter (3) Human beings (3) Letters (3) Letter writing (3) Europe (3) Correspondence (3) Cluster analysis (3)