Tilden, Amer. Algae
Tilden, J.E. [1-650]

Michigan State University Algae
Catalog #: MSC0182298
Josephine E. Tilden #s.n. 10 August 1901
Cyclotella operculata (C.Agardh) Brébisson
United States, Minnesota, Saint Louis, Lincoln Park, Duluth

Miami University - Algae
Catalog #: 000179995
Josephine E. Tilden #s.n. 10 August 1901
Cyclotella operculata (C.Agardh) Brébisson
United States, Minnesota, Saint Louis, Lincoln Park, Duluth