gestion de l'eau (2) Antiquities, Prehistoric (2) Stone (2) Occupations (2) Prehistoric peoples (2) Vocational guidance (2) Materials (2) Canteras (2) Orientación profesional (2) Materiales (2) Pierre (2) Professions (2) Pierre (2) Matériaux (2) Orientation professionnelle (2) Carrières (exploitations minières) (2) roche (2) histoire de l'art (2) matériaux (2) Delphes (2) Discovery and exploration (1) Observations (1) Observations (1) Water (1) Sandstone (1) Geology (1) Facial expression (1) Evidence (1) Employment (Economic theory) (1) Comprehension (1)