@article{219264,
      note = {Shipping list no.: 98-0809-M.},
      author = {Kunk, Michael J. and Wintsch, Robert Peter,},
      url = {http://library.usi.edu/record/219264},
      title = {⁴⁰Ar/³⁹Ar age-spectrum data for whole rock samples  of the Martinsburg Formation, Lehigh Gap area, Pennsylvania  [microform] /},
      publisher = {U.S. Dept. of the Interior, Geological  Survey,},
      recid = {219264},
      pages = {1 v.},
      address = {[Reston, Va.] :},
      year = {1996},
}