Houston Area Urban Forestry Council	http://www.houstonareaurbanforestrycouncil.org/
Keep Texas Beautiful	http://www.ktb.org
Texas AgriLife Extension Service - Ecosystem Science & Management Unit	http://essmextension.tamu.edu/
Texas Forest Service	http://txforestservice.tamu.edu
Texas Maps	http://www.texas-maps.com
The Grove Tree Folks	http://www.treefolks.org http://www.americangrove.org/tx/
TreeLink log on ~ branch out®	http://www.treelink.org
Trinity Blacklands Urban Forestry Council	http://www.tbufc.org
Valley Proud Environmental Council	http://www.valleyproud.org