Stone (4) Pierre (4) Pierre (4) roche (4) France (2) Employment (2) Communication (2) Occupations (2) Comunicación (2) Trabajo (2) Communication (2) Travail (2) Communication (2) France (2) Development (1) Platforms (1) Methods (1) Platforms (1) Fiction (1) Programmed instruction (1) Notions (Philosophy) (1) Year (1) Teeth (1) Technologists (1) Teaching (1) Teachers (1) Self-culture (1) Possibility (1) Motion (1) Human beings (1)