Catalog Index By LC Categories
- D - History (General)
- DA - Great Britain
- DAW - Central Europe
- DB - Austria - Liechtenstein - Hungary - Czechoslovakia
- DC - France - Andorra - Monaco
- DD - Germany
- DE - Greco-Roman World
- DF - Greece
- DG - Italy - Malta
- DH - Low Countries - Benelux Countries
- DJ - Netherlands (Holland)
- DJK - Eastern Europe (General)
- DK - Russia. Soviet Union. Former Soviet Republics - Poland
- DL - Northern Europe. Scandinavia
- DP - Spain - Portugal
- DQ - Switzerland
- DR - Balkan Peninsula
- DS - Asia
- DT - Africa
- DU - Oceania (South Seas)
- DX - Gypsies