An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Mamo M, Gupta SC, Rosen CJ, Singh UB.Mamo M, et al. Among authors: gupta sc.J Environ Qual. 2005 Jun 7;34(4):1243-50. doi: 10.2134/jeq2004.0339. Print 2005 Jul-Aug.J Environ Qual. 2005.PMID: 15942043
Johnson HO, Gupta SC, Vecchia AV, Zvomuya F.Johnson HO, et al. Among authors: gupta sc.J Environ Qual. 2009 Mar 25;38(3):1018-30. doi: 10.2134/jeq2008.0250. Print 2009 May-Jun.J Environ Qual. 2009.PMID: 19329690