@article{219402,
      note = {Cover title.},
      author = {McGee, E. S.},
      url = {http://library.usi.edu/record/219402},
      title = {Philadelphia Merchants' Exchange conservation strategy  marble characteristics and deterioration / [microform] :},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey,},
      recid = {219402},
      pages = {28 leaves :},
      address = {Reston, VA :},
      year = {1996},
}