EMMMA [electronic resource] : a web-based system for environmental mercury mapping. modeling, and analysis / by Paul P. Hearn, Jr. ... [et al.] ; National Institute of Environmental Health Sciences.
Imprint
[Reston, VA] : U.S. Dept. of the Interior, U.S. Geological Survey, [2006]
Mode of access: Internet from the USGS web site. Address as of 9/6/07: http://erg.usgs.gov/isb/pubs/ofrs/2006-1086/ofr2006-1086.pdf; current access via PURL.
Note
Title from title screen (viewed on Sept., 6, 2007).
