DS - Asia 286
D - General History 249
DA - Great Britain 216
DK - Russia, Soviet Union, Former Soviet Republics, Poland 110
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 39
DT - Africa 27
DD - Germany 24
DR - Balkan Peninsula 19
DG - Italy, Malta 17
DU - Oceania (South Seas) 17
DC - France, Andorra, Monaco 15
DF - Greece 12
DJK - Eastern Europe (General) 9
DL - Northern Europe, Scandinavia 8
DP - Spain, Portugal 4
Z - Books and Writing 4
DX - Gypsies 3
DE - Grecco-Roman World 2
DJ - Netherlands (Holland) 2
CS - Genealogy 1
DH - Low Countries 1
DQ - Switzerland 1
PM - Hyperborean, Indian, and Artificial Languages 1
PS - American Literature 1
TX - Home Economics 1