Clasificación de la Biblioteca del CongresoDD247.D63
⮑ DD. Germany
⮑ DD1-905. History of Germany
⮑ DD84-257.4. History
⮑ DD121-257.4. By period
⮑ DD175-257.4. Modern, 1519-
⮑ DD201-257.4. 19th-20th centuries
⮑ DD233-257.4. Revolution and Republic, 1918-