@misc{indiciae72da6d41ef13, title = {Copper, lead, mercury and zinc in periphyton from the south Florida ecosystem}, author = {T. Cox and N.S. Simon and L. Newland}, year = {1999}, doi = {10.1080/02772249909358754}, url = {https://pubs.usgs.gov/publication/70022032}, note = {Source identifier: 70022032} }