DS - Asia 960,884
D - General History 305,613
DK - Russia, Soviet Union, Former Soviet Republics, Poland 250,782
DT - Africa 183,008
DA - Great Britain 177,280
DC - France, Andorra, Monaco 145,494
DG - Italy, Malta 134,861
DD - Germany 126,650
DR - Balkan Peninsula 101,724
DP - Spain, Portugal 83,378
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 56,109
DF - Greece 43,714
DU - Oceania (South Seas) 31,265
DL - Northern Europe, Scandinavia 29,527
DQ - Switzerland 13,509
DJ - Netherlands (Holland) 10,982
DH - Low Countries 10,165
DE - Grecco-Roman World 6,701
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