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  1. NLM Digital Collections - Physiological chemistry (Volume 2) 
    Publication: Philadelphia : Blanchard & Lea, 1855
    resource.nlm.nih.gov/07930730RX2
    ... the urine, as for instance, the pigment of alkanna, of gamboge, whortleberries, black cherries, rhubarb, logwood, madder, ...
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