APPENDIX III-N: West Nile Virus Current Maps and Charts, 2007.

http://www.cdc.gov/ncidod/dvbid/westnile/Mapsactivity/surv&control07Maps.htm

http://diseasemaps.usgs.gov/wnv_us_human.html

http://diseasemaps.usgs.gov/wnv_co_human.html

http://www.cdphe.state.co.us/dc/zoonosis/wnv/HUMAN_WNV_07.HTML