C - General History 23,186
CT - Biography 207
CB - History of Civilization 197
CD - Diplomatics, Archives, Seals 193
CC - Archaeology 173
CS - Genealogy 124
CJ - Numismatics 101
CN - Inscriptions, Epigraphy 85
CR - Heraldry 56
CE - Technical Chronology, Calendar 46
HV - Social Pathology, Criminology 1
KF - United States 1
TH - Building Construction 1