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	1.	[Analysis of the polyphenols in the root of Rheum palmatum L]. [electronic resource] by Friedrich, H Höhle, J Producer: 19670225 In: Archiv der Pharmazie und Berichte der Deutschen Pharmazeutischen Gesellschaft vol. 299 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	[Occurrence and distribution of polyphenols in various species of the genus Rheum]. [electronic resource] by Friedrich, H Höhle, J Producer: 19671105 In: Planta medica vol. 14 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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