@misc{indiciae50acc1766b3a,
  title = {The comparison of usage and availability measurements for evaluating resource preference},
  author = {Douglas H. Johnson},
  year = {1980},
  doi = {10.2307/1937156},
  url = {https://pubs.usgs.gov/publication/1001421},
  note = {Source identifier: 1001421}
}