@article{198700,
      note = {Relief shown by contours and spot heights.},
      author = {Jachens, Robert C. and Snyder, Stephen L. and Roberts,  Carter W.},
      url = {http://library.usi.edu/record/198700},
      title = {Aeromagnetic map of the Victorville 1:100,000 scale  quadrangle, California [microform] /},
      publisher = {The Survey  ;},
      recid = {198700},
      pages = {1 map ;},
      address = {[Reston, Va.] :},
      year = {1993},
}