History is a multi-disciplinary field that spans the entire span of subject areas. While the majority of History research is in either the Library of Congress classes of 'D' and 'E and F", it can also be found in other subject areas. The history of specific topics, like history of Buddhism or the history of automobiles will be within those subject class areas.
Holocaust, Jewish (1939-1945)- D804.3
Holocaust, Jewish (1939-1945)- Personal narratives- D804.3-805.5
Holocaust Denial- D804.35
Holocaust, Jewish (1939-1945)-Reparations- D819.G3
Genocide- HV6322.7
Holocaust, Jewish and the arts- NX180 .H59
Holocaust, Jewish, in motion pictures- PN1995.9 H53
Primary History Class sections
D1- DX- World History
E and F- History of North and South America
Examples of the history of specific subject areas
BF81- History of Psychology
LA11-13- History of Education
ML160- History of Music
R131- History of Medicine
QD11- History of Chemistry, Alchemy