Columbia subject headings:
Blossfeldt, Karl, 1865-1932--Criticism and interpretation.
Haeckel, Ernst, 1834-1919.
Nature (Aesthetics)
Nature in art.
Photography of plants.
Harvard subject headings:
Blossfeldt, Karl, 1865-1932--Criticism and interpretation.
Haeckel, Ernst Heinrich Philipp August, 1834-1919.
Nature (Aesthetics)
Nature in art
Photography of plants.
Princeton subject headings: