@article{216786,
      note = {Originally presented as "Gravel deposit models of the  Front Range urban corridor, Colorado" at the 34th annual  Forum on Industrial Minerals, May 2-6, 1998, Norman,  Oklahoma.},
      author = {Lindsey, David A. and Langer, William H.},
      url = {http://library.usi.edu/record/216786},
      title = {Slide show on gravel deposit models and measuring  aggregate quality, Front Range urban corridor, Colorado  [microform] /},
      publisher = {U.S. Dept. of the Interior, U.S. Geological Survey,},
      recid = {216786},
      address = {[Denver, CO] :},
      year = {1998},
}