• APHIS - Animal and Plant Health Inspection Service

  • ChemFinder - Info on Pesticides

  • CRIS - Current Research Information  Service - U.S. Dept. of Agriculture

  • CTR - Center for Transportation  Research, Austin, TX

  • EPA - Environmental Protection Agency  Pesticide Programs

  • EXTOXNET - Pesticide Toxicology Information

  • FHWA - The Federal Highway  Administration

  • GREENBOOK - (Labels & MSDS)

  • IES - Institute of  Ecosystem Studies - Publications by Year

  • ISA - International Society of Arborculture

  • LATRC - Louisiana Transportation Research  Center

  • Model Certification Training Manual

  • NRVMA - National Roadside Vegetation Management Association

  • NTT - National Tree  Trust

  • RISE - Industry for a Sound Environment

  • TFHRC - Turner Fairbanks Highway Research Center

  • TRB - Transportation Research Board

  • TRF - Transportation Research Forum

  • TTI - Texas Transportation Institute

  • USDA - The United States Department of  Agriculture