Adams County Parks and Community Resources Department http://www.co.adams.co.us/
Boulder County Weeds Division http://www.co.boulder.co.us/openspace/resources/weeds/weeds_div.htm
Weld County Weed Division http://www.co.weld.co.us/departments/weed_pest/index.html
Larimer County Weed Control District http://www.co.larimer.co.us/weeds/
Colorado
Noxious Weed Mgt. Program http://www.colorado.gov/cs/Satellite/Agriculture-Main/CDAG/1167928159176
Deer
Trail Soil Conservation District http://www.geocities.com/deertrailscd/index.html
East
Adams Soil Conservation District http://www.geocities.com/eastadamsscd/index.html
Colorado
Weed Management Association http://www.cwma.org
Colorado
Native Plant Society - http://www.conps.org/conps.html
Colorado
Natural Heritage Program http://www.cnhp.colostate.edu/
The
Nature Conservancy Colorado Field Office http://www.nature.org/colorado
Nebraska
Noxious Weed Program http://www.agr.state.ne.us/division/bpi/nwp/nwh.htm
North
American Weed Management Association http://www.nawma.org
USDA
APHIS Plant Protection - Noxious Weed http://www.aphis.usda.gov/ppq/weeds/
BLM
Weed Education http://www.blm.gov/education/weed/weed.html
USDA
NCRS Plants Database http://plants.usda.gov/
The
Nature Conservancy Wildland Invasive Species Team - http://tncweeds.ucdavis.edu/
Chemical
& Pharmaceutical Press, Inc (labels, supplemental
labels, & MSDSs) http://www.greenbook.net
National
Pesticide Info Center (NPIC) http://ace.orst.edu/info/npic/
CSU
Extension Answerlink http://www.answerlink.info
