TY  - RPRT
TI  - SPECTRAL REFLECTANCE METHOD TO MEASURE ACID DEPOSITION EFFECTS ON BUILDING STONE.
AU  - Marguerite J. Kingston
AU  - Cathy M. Ager
PY  - 1985
UR  - https://pubs.usgs.gov/publication/70013279
ID  - 70013279
ER  -