Maren's Kunst 

DE MATERIA MEDICA Pedanios Dioscurides

https://archive.org/stream/de-materia-medica

/scribd-download.com_dioscorides-de-materia

-medica_djvu.txt

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PEKANA International (Spagyric Company)

http://www.pekana.com/

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WELEDA International (spagyric Company)

https://www.weleda.com/

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Herb lexicon - healing herbs

http://en.heilkraeuter.net/

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The doctrine of signature

http://www.naturasophia.com/Signatures.html