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Tilden, Amer. Algae
Tilden, J.E. [1-650]
Michigan State University Algae
Catalog #: MSC0183665
Josephine E. Tilden #s.n. 20 August 1901
Nitzschia sigmoidea (Nitzsch) W.Smith
United States, Minnesota, Saint Louis, Dalles of the Saint Louis river, three miles above Fond du Lac, Duluth
Miami University - Algae
Catalog #: 000179991
Josephine E. Tilden #s.n. 20 August 1901
Nitzschia sigmoidea (Nitzsch) W.Smith
United States, Minnesota, Saint Louis, Dalles of the Saint Louis river, three miles above Fond du Lac, Duluth