The flora of Essex County, Massachusetts Robinson, John, 1846-1925 creator text book Salem Essex Institute 1880 1880
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ENG Britton's Bibliography, 1890. Whitney, Mrs. M. Bicknell Library. Horticultural Society of New York gift, June 2006 K. K. Mackenzie collection Essex County Massachusetts Plants https://www.biodiversitylibrary.org/bibliography/62437 5216200 06032441 10.5962/bhl.title.62437 DLC