Columbia subject headings:
Harvard subject headings:
Authors, Exiled--Argentina--Congresses.
Authors, German--20th century--Congresses.
Authors, German--Argentina--Congresses.
Zech, Paul, 1881-1946--Congresses.
Zech, Paul, 1881-1946--Homes and haunts--Argentina--Congresses.
Princeton subject headings:
Authors, German--20th century--Congresses.
Authors, German--Argentina--Congresses.
Zech, Paul, 1881-1946--Homes and haunts--Argentina--Congresses.