@article{226837,
      note = {One folded map and one folded plate in pocket.},
      author = {Vroblesky, Don A. and Fleck, William B.},
      url = {http://library.usi.edu/record/226837},
      title = {Hydrogeologic framework of the coastal plain of Maryland,  Delaware, and the District of Columbia /},
      publisher = {U.S. G.P.O. ;},
      recid = {226837},
      pages = {vi, 45 p. :},
      address = {Washington :},
      year = {1991},
}