DS - Asia 961,126
D - General History 305,650
DK - Russia, Soviet Union, Former Soviet Republics, Poland 250,840
DT - Africa 183,040
DA - Great Britain 177,282
DC - France, Andorra, Monaco 145,505
DG - Italy, Malta 134,877
DD - Germany 126,677
DR - Balkan Peninsula 101,737
DP - Spain, Portugal 83,410
DB - Austria, Liechtenstein, Hungary, Czechoslovakia 56,116
DF - Greece 43,726
DU - Oceania (South Seas) 31,267
DL - Northern Europe, Scandinavia 29,534
DQ - Switzerland 13,510
DJ - Netherlands (Holland) 10,983
DH - Low Countries 10,167
DE - Grecco-Roman World 6,700
DJK - Eastern Europe (General) 5,876
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