Columbia subject headings:
Flesch, Carl, 1873-1944--Correspondence.
Flesch, Carl, 1873-1944.
Rostal, Max--Correspondence.
Rostal, Max.
Violin--Study and teaching--Germany--Berlin.
Violinists--Germany.
Harvard subject headings:
Flesch, Carl, 1873-1944--Correspondence.
Flesch, Carl, 1873-1944.
Rostal, Max--Correspondence.
Rostal, Max.
Violin--Study and teaching--Germany--Berlin.
Violinists--Germany.
Princeton subject headings:
Flesch, Carl, 1873-1944--Correspondence.
Flesch, Carl, 1873-1944.
Rostal, Max--Correspondence.
Rostal, Max.
Violin--Study and teaching--Germany--Berlin.
Violinists--Germany.