@article{226368,
      note = {"Prepared by the U.S. Bureau of Sport Fisheries and  Wildlife, in collaboration with the U.S. Geological  Survey."},
      author = {Stewart, Robert E. and Kantrud, Harold A.,},
      url = {http://library.usi.edu/record/226368},
      title = {Vegetation of prairie potholes, North Dakota, in relation  to quality of water and other environmental factors,},
      publisher = {U.S. Govt. Print. Off.,},
      recid = {226368},
      pages = {iv, 36 p. :},
      address = {Washington,},
      year = {1972},
}