1.		O ar e a sua poluição / Caroline Toutain; Laurent Audouin (il.) ; Esmeralda Pereira (trad.) Autor: Toutain, Caroline
2.		Aspects generaux de la pollution atmospherique / F. Faux, A. J. Clarke Autor: FAUX, F.
3.		General aspects of air pollution / F. Faux, A. J. Clarke Autor: FAUX, F.
4.		Mechanical equipment for removing grit and dust from gases / R. Jackson Autor: JACKSON, R.