McQuillan, D., Mullany, J., Parker, J., Mills, D., Sherrell, K. and Chapman, T.H., 2000. Drug Residues in Ambient Water: Initial Surveillance in New Mexico, USA. December 2000 Progress Report, http://www.nmenv.state.nm.us/gwb/drugs.html; Morelli, J., 2000. Are Our Medicines Tainting the Environment? http://webmd.lycos.com/content/article/25/1728_58159?
