Columbia subject headings:
Artists--Germany--Correspondence.
Klinger, Max, 1857-1920--Correspondence.
Physicians--Germany--Correspondence.
Schirren, Carl, 1861-1921--Correspondence.
Harvard subject headings:
Artists--Germany--Biography.
Klinger, Max, 1857-1920--Correspondence.
Physicians--Germany--Biography
Schirren, Carl, 1861-1921--Correspondence.
Princeton subject headings:
Artists--Germany--Correspondence.
Klinger, Max, 1857-1920--Correspondence.
Physicians--Germany--Correspondence.
Schirren, Carl, 1861-1921--Correspondence.