Columbia subject headings:
Authors, German--Correspondence.
Wagner, Christian, 1835-1918--Correspondence.
Weltrich, Richard, 1844-1913--Correspondence.
Harvard subject headings:
Authors, German--19th century--Biography
Authors, German--19th century--Correspondence
Authors, German--19th century--Correspondence.
Wagner, Christian, 1835-1918--Correspondence.
Weltrich, Richard, 1844-1913--Correspondence.
Princeton subject headings: