Migula, Krypt. Germ., Austr. Helv. Exs. [Algen]
Migula, E.F.A.W. [1 - 300]

Drexel University, Academy of Natural Sciences
Catalog #: PH00348429
W. Migula #159 00 March 1918
Frustulia vulgaris (Thwaites) De Toni
Germany, Dankmarshausen, Thuringen

Miami University
Catalog #: 000163100
W. Migula #s.n. 00 March 1918
Frustulia vulgaris (Thwaites) De Toni
Germany, Dankmarshausen, Thuringen

Michigan State University
Catalog #: MSC0182669
W. Migula #s.n. 00 March 1918
Frustulia vulgaris (Thwaites) De Toni
Germany, Dankmarshausen, Thuringen