DS - Asia 957,887
D - General History 305,007
DK - Russia, Soviet Union, Former Soviet Republics, Poland 250,245
DT - Africa 182,720
DA - Great Britain 177,038
DC - France, Andorra, Monaco 145,267
DG - Italy, Malta 134,526
DD - Germany 126,434
DR - Balkan Peninsula 101,559
DP - Spain, Portugal 83,248
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 55,998
DF - Greece 43,592
DU - Oceania (South Seas) 31,200
DL - Northern Europe, Scandinavia 29,457
DQ - Switzerland 13,485
DJ - Netherlands (Holland) 10,965
DH - Low Countries 10,149
DE - Grecco-Roman World 6,696
DJK - Eastern Europe (General) 5,870
DX - Gypsies 3,113
DAW - Central Europe 1,043
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