DS - Asia 964,371
D - General History 306,285
DK - Russia, Soviet Union, Former Soviet Republics, Poland 251,729
DT - Africa 183,452
DA - Great Britain 177,592
DC - France, Andorra, Monaco 145,744
DG - Italy, Malta 135,169
DD - Germany 126,938
DR - Balkan Peninsula 102,050
DP - Spain, Portugal 83,597
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 56,221
DF - Greece 43,858
DU - Oceania (South Seas) 31,330
DL - Northern Europe, Scandinavia 29,582
DQ - Switzerland 13,538
DJ - Netherlands (Holland) 11,016
DH - Low Countries 10,189
DE - Grecco-Roman World 6,711
DJK - Eastern Europe (General) 5,895
DX - Gypsies 3,126
DAW - Central Europe 1,047
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