"Química." . . "Fisicoquímica." . . "Chemistry." . . . . . "Chemical systems" . "Chemical systems"@en . . . . . . . . . . . . . . . . . . "Chemical systems. Teachers' guide" . . . . . . . . . . . . "Chimie." . . "Biographie, chimistes." . . "Chimie, système." . . "Chemical Bond Approach Project (U.S.)" . . "CBA." . . "Chemical Bond Approach Project." . .