@article{73674,
      author = {Walker, Frank H. and Puryear, Robert E., and Cathey,  Joseph B.,},
      url = {http://library.usi.edu/record/73674},
      title = {Geology and mineral resources of the Henderson quadrangle,  Kentucky,},
      recid = {73674},
      pages = {32 p.},
      address = {Lexington,},
      year = {1951},
}