Portland Society of Natural History (Me.). (1892). The Portland catalogue of Maine plants (2nd ed.). Portland society of natural history.
Style de citation Chicago (17e éd.)Portland Society of Natural History (Me.). The Portland Catalogue of Maine Plants. 2nd ed. Portland: Portland society of natural history, 1892.
Style de citation MLA (8e éd.)Portland Society of Natural History (Me.). The Portland Catalogue of Maine Plants. 2nd ed. Portland society of natural history, 1892.
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