@misc{indiciae1c9c5c8c8e1e,
  title = {Growth, age at metamorphosis, and sex ratio of northern brook lamprey in a tributary of southern Lake Superior},
  author = {Harold A. Purvis},
  year = {1970},
  doi = {10.2307/1441654},
  url = {https://pubs.usgs.gov/publication/1000287},
  note = {Source identifier: 1000287}
}