La nature and vous biologie - Bock, Christian; Camus, Claude; Chaffard, Joël; Darbois, Michel; Guillot, Gérard; Hughes, Edmond; Mahe, JoëL; Monchamp, Alain; Philippot, Jacques; Richard, Daniel; Rumelhard, Guy; Turquier, Yves; et al. (Classe de Sixieme Colleges, 6, 1977)