Letter	Sub heading
A	Danish studies generally
B	Danish language
BM	Old Danish language
C	Danish literature generally
E	Medieval literature, to 1500
H	Literature on the Reformation, 16th century
J	Seventeenth-century literature
L	Eighteenth-century literature
N	Literature of the Age of Romanticism, 1800-1870
P	Literature of the Age of Realism. 1870-1920
R	Twentieth-century literature from 1920
S	Contemporary literature from 2000