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Date: 2016-06-22 16:24:03Arnold Arboretum Emerald Necklace Harvard University Massachusetts Arboretum Scientific collection Herbarium Walden Science | On the Importance of Scientific Collections A Series by Natural Science Collections Alliance How Thoreau, Walden, and Herbarium Specimens Informed Research Boston University biology professor Richard Primack, Ph.D., callAdd to Reading ListSource URL: nscalliance.orgDownload Document from Source WebsiteFile Size: 524,16 KBShare Document on Facebook |