@article{199027,
      note = {Relief shown by contours and spot heights.},
      author = {Ponce, David A. and Langenheim, Victoria E.},
      url = {http://library.usi.edu/record/199027},
      title = {Isostatic residual gravity map of the Palm Springs  1:100,000 quadrangle, California [microform] /},
      publisher = {The Survey ;},
      recid = {199027},
      pages = {1 map ;},
      address = {[Reston, Va.] :},
      year = {1992},
}