1. Effects of Acidic Deposition on Materials;Baedecker,1990
2. The Philadelphia Merchants Exchange: development of a conservation strategy;Brookover,1992
3. Analysis of respirable fractions in atmospheric particulate via sequential filtration;Cahill;J. Air Pollut. Control Assoc.,1977
4. Measuring stone decay with close range photogrammetry;Coe,1992
5. A comparison of ambient airborne sulfate concentrations determined by several different filtration techniques;Dolske,1983