Columbia subject headings:
Authors as criminals--Germany.
Authors, German--19th century--Biography.
Authors, German--20th century--Biography.
Biographies.
May, Karl, 1842-1912--Psychology.
Wulffen, Erich, 1862-1936--Adversaries.
Wulffen, Erich, 1862-1936--Manuscripts.
Harvard subject headings:
Archival materials--Germany.
Authors, German--19th century--Biography
Criminal psychology--Case studies.
May, Karl, 1842-1912
May, Klara, 1864-1944--Correspondence.
Schmid, E. A.--Correspondence.
Wulffen, Erich, 1862-1936--Correspondence.
Wulffen, Erich, 1862-1936.
Princeton subject headings:
Authors as criminals--Germany.
Authors, German--19th century--Biography.
Authors, German--20th century--Biography.
May, Karl, 1842-1912--Psychology.
Wulffen, Erich,--Adversaries.
Wulffen, Erich,--Manuscripts.