@misc{indiciae1c6195c74eb3,
  title = {Land use and land cover, 1972-76, Grand Rapids, Michigan},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/l187},
  url = {https://pubs.usgs.gov/publication/l187},
  note = {Source identifier: l187}
}