• AOSA (Assoc. of Official Seed Analysts) www.aosaseed.com
• Tetrazolium testing website: go to http://www.aosaseed.com/2005TZwebsite/TZcommitteemain.html
  
• SCST (Society of Commercial Seed Technologists)  www.seedtechnology.net
• ISTA (International Seed Testing Association) www.seedtest.org
• ASTA (American Seed Trade Association) www.amseed.com
  
• AASCO (Assoc. of American Seed Control Officials) Go to AASCO membership directory for links to state seed laws:  www.seedcontrol.org
• Colorado's seed law http://www.ag.state.co.us/DPI/rules/seed.pdf
• All states' noxious weed list http://www.ams.usda.gov/lsg/seed/seed_pub.htm
• University of Montana  Invaders noxious weed database  http://invader.dbs.umt.edu
• GRIN (Germplasm Information Resources Network)  Nomenclature queries  http://www.ars-grin.gov/cgi-bin/npgs/html/queries.pl
• Federal Seed Act:  http://www.ams.usda.gov/lsg/seed/seed_pub.htm
• SeedImages:   http://www.seedimages.com/
  
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