Columbia subject headings:
Concrete poetry, German--History and criticism.
Gomringer, Eugen, 1925---Criticism and interpretation.
Harvard subject headings:
Concrete poetry, German--History and criticism.
Gomringer, Eugen, 1925---Criticism and interpretation.
Princeton subject headings:
Concrete poetry, German--History and criticism.
Gomringer, Eugen, 1925---Criticism and interpretation.