Total selenium and selenium species in irrigation drain inflows to the Salton Sea, California, April and July 2007 [electronic resource] / by Thomas W. May ... [et al.].
Mode of access: Internet from the USGS web site. Address as of 1/2/08: http://pubs.usgs.gov/of/2007/1347/pdf/OFR2007-1347.pdf; current access via PURL.
Note
Title from PDF title screen (viewed on Dec. 14, 2007).