More on coumarin and natural sources, including oils, Updated Jan. 2008
http://www.leffingwell.com/Coumarin%...%20update2.pdf
"Herbs thought to contain coumarin or coumarin derivatives"
http://books.google.ca/books?id=ihxy...um=4&ct=result
Chamomile and coumarin
http://www.sciencedirect.com/science...891d4ad3ec9b67
Chamomile oil extract and coumarin
http://books.google.ca/books?id=pc7X...m=10&ct=result
Chamomile flowers and coumarin
http://books.google.ca/books?id=pc7X...um=1&ct=result
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