@article{121947,
      author = {Mullens, Marjorie C. and Roberts, Albert Eugene,},
      url = {http://library.usi.edu/record/121947},
      title = {Selected annotated bibliography on asphalt-bearing rocks  of the United States and Canada, to 1970,},
      publisher = {U.S. Govt. Print. Off.,},
      abstract = {"A compilation of about 600 selected references pertaining  to the geology and occurrence of asphalt-bearing rocks."},
      recid = {121947},
      pages = {iv, 218 p. :},
      address = {Washington,},
      year = {1972},
}