@misc{indiciaec42d7824abf7, title = {Relationship between Secchi disc readings and light penetration in Lake Huron}, author = {Alfred M. Beeton}, year = {1958}, doi = {10.1577/1548-8659(1957)87[73:rbsdra]2.0.co;2}, url = {https://pubs.usgs.gov/publication/1000102}, note = {Source identifier: 1000102} }