Assessment of metal contamination in the biota of four rivers experiencing varying degrees of human impact - Gretchen K. Bielmyer-Fraser; Matthew Neal Waters; Christina G. Duckworth; Pratik P. Patel; Benjamin Cole Webster; Amber Blocker; Cliff Hunter Crummey; Aundrea Nicole Duncan; Somuayiro Nadia Nwokike; Codie Richard Picariello; James T. Ragan; Erika L. Schumacher; et al. (Environmental Monitoring and Assessment, 2017)