1. Diffusion In and Through Solids;Barrer,1941
2. Aerodynamic Capture of Particles;Chamberlain,1960
3. Chamberlain A. C. (1967) Private communication.
4. Absorption of atmospheric sulphur dioxide by clay, brick and other building stones;Gilardie,1966
5. Some mineralogical aspects of air pollution damage to limestone;Henley,1967