Columbia subject headings:
Harvard subject headings:
Kneser, Adolf, 1862-1930.
Mathematicians--Germany--Biography
Mathematicians--Soviet Union--Biography
Steklov, V. (Vladimir), 1864-1926.
Princeton subject headings:
Kneser, Adolf, 1862-1930.
Mathematicians--Correspondence.
Steklov, V. (Vladimir), 1864-1926.