Columbia subject headings:
Diatoms--Catalogs and collections.
Hustedt, Friedrich, 1886-1968.
Harvard subject headings:
Algae--Type specimens--Catalogs and collections--Germany--Bremerhaven.
Diatoms--Atlases.
Diatoms--Catalogs and collections--Germany--Bremerhaven.
Diatoms--Catalogs and collections.
Hustedt, Friedrich, 1886---Herbarium--Catalogs.
Hustedt, Friedrich, 1886---Natural history collections.
Hustedt, Friedrich, 1886-1968--Herbarium--Catalogs.
Princeton subject headings: