1. The Weathering of Natural Building Stones;Schaffer,1932
2. The mechanism of masonry decay through crystallization;Lewin,1982
3. Stone decay and conservation;Amorosa,1983
4. Practical Building Conservation, Vol. 1. Stone Masonry;Ashurst,1988
5. Corrosion of Building Materials due to Atmospheric Pollution in the United Kingdom;Manning,1988