@article{68622,
      author = {Koenig, James B.},
      url = {http://library.usi.edu/record/68622},
      title = {The petrography of certain igneous dikes of Kentucky /},
      publisher = {Kentucky University Geological Survey,},
      recid = {68622},
      pages = {56 p. :},
      address = {Lexington :},
      year = {1956},
}