@misc{indiciaeb6a574a22a49,
  title = {Proceedings of the Geology and food conference, with related U.S. Geological Survey projects and a bibliography},
  author = {Flora K. Walker},
  year = {1977},
  doi = {10.3133/cir768},
  url = {https://pubs.usgs.gov/publication/cir768},
  note = {Source identifier: cir768}
}