@book{ 0-1653224207, title = {Effects of surface applications of biosolids on groundwater quality and trace-element concentrations in crops near Deer Trail, Colorado, 2004-2010}, series = {Scientific investigations report}, author = {Yager, Tracy J. B.}, address = {Reston, Virginia}, publisher = {U.S. Department of the Interior, U.S. Geological Survey}, year = {2013}, language = {English}, url = {http://pubs.usgs.gov/sir/2013/5065/}, url = {https://katalog.ub.tu-freiberg.de/Record/0-1653224207} }