Columbia subject headings:
Harvard subject headings:
Authors, German--20th century--Correspondence
Dietrich, Maximilian, 1903-
Mauriņa, Zenta, 1897---Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Dietrich, Maximilian, 1903-
Maurin̦a, Zenta, 1897-1978. Correspondence.