@misc{indiciaed6a1e8598979,
  title = {Abundance and distribution of the Pacific walrus: results of the first Soviet/American joint aerial survey, autumn 1975},
  author = {J. A. Estes and V. Gol444tsev},
  year = {1984},
  url = {https://pubs.usgs.gov/publication/2002196},
  note = {Source identifier: 2002196}
}