DS - Asia 960,591
D - General History 305,543
DK - Russia, Soviet Union, Former Soviet Republics, Poland 250,731
DT - Africa 182,957
DA - Great Britain 177,244
DC - France, Andorra, Monaco 145,469
DG - Italy, Malta 134,821
DD - Germany 126,614
DR - Balkan Peninsula 101,702
DP - Spain, Portugal 83,354
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 56,102
DF - Greece 43,694
DU - Oceania (South Seas) 31,260
DL - Northern Europe, Scandinavia 29,518
DQ - Switzerland 13,507
DJ - Netherlands (Holland) 10,981
DH - Low Countries 10,163
DE - Grecco-Roman World 6,702
DJK - Eastern Europe (General) 5,877
DX - Gypsies 3,116
DAW - Central Europe 1,045
E - United States History 2
B - Philosophy 1
C - General History 1
GA - Mathematical Geography and Cartography 1
JV - Colonization, Immigration 1
PA - Latin and Greek 1
T - General Technology 1