Columbia subject headings:
Dieckmann, Johannes, 1893-1969--Congresses.
Germany (East)--Politics and government--Congresses.
Statesmen--Germany (East)--Biography--Congresses.
Harvard subject headings:
Dieckmann, Johannes, 1893-1969--Congresses.
Germany (East)--Politics and government--Congresses.
Statesmen--Germany (East)--Biography--Congresses.
Princeton subject headings: