DS - Asia 959,029
D - General History 305,394
DK - Russia, Soviet Union, Former Soviet Republics, Poland 250,668
DT - Africa 182,900
DA - Great Britain 177,214
DC - France, Andorra, Monaco 145,437
DG - Italy, Malta 134,774
DD - Germany 126,565
DR - Balkan Peninsula 101,686
DP - Spain, Portugal 83,312
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 56,089
DF - Greece 43,655
DU - Oceania (South Seas) 31,235
DL - Northern Europe, Scandinavia 29,511
DQ - Switzerland 13,504
DJ - Netherlands (Holland) 10,978
DH - Low Countries 10,159
DE - Grecco-Roman World 6,699
DJK - Eastern Europe (General) 5,874
DX - Gypsies 3,116
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