TY  - RPRT
TI  - The Effect of Selected Cleaning Techniques on Berkshire Lee Marble: A Scientific Study at Philadelphia City Hall
AU  - Victor G. Mossotti
AU  - A. Raouf Eldeeb
AU  - Terry L. Fries
AU  - Mary Jane Coombs
AU  - Virginia N. Naude
AU  - Lisa Soderberg
AU  - George S. Wheeler
PY  - 2002
DO  - 10.3133/pp1635
UR  - https://pubs.usgs.gov/publication/pp1635
ID  - pp1635
ER  -