DS - Asia 962,605
D - General History 305,962
DK - Russia, Soviet Union, Former Soviet Republics, Poland 251,277
DT - Africa 183,258
DA - Great Britain 177,454
DC - France, Andorra, Monaco 145,647
DG - Italy, Malta 135,022
DD - Germany 126,805
DR - Balkan Peninsula 101,850
DP - Spain, Portugal 83,479
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 56,173
DF - Greece 43,801
DU - Oceania (South Seas) 31,298
DL - Northern Europe, Scandinavia 29,558
DQ - Switzerland 13,525
DJ - Netherlands (Holland) 11,004
DH - Low Countries 10,174
DE - Grecco-Roman World 6,702
DJK - Eastern Europe (General) 5,892
DX - Gypsies 3,121
DAW - Central Europe 1,046
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