Letter	Sub heading
A	German studies generally
B	German language
C	German literature generally
D	Old High German period to 1050
E	Middle High German period 1050-1350
G	Early New High German period 1350-1500
H	Sixteenth century literature: the Reformation
J	Seventeenth century: the Renaissance
K	Eighteenth century up to and including Lessing
L	Eighteenth century: Herder to 1800
LG	Johann Wolfgang von Goethe 1749-1832
LS	Johann Christoph Friedrich von Schiller 1759-1805
M	Early nineteenth century: Romantic School
N	Mid-nineteenth century: ca. 1830-1880
P	1880-1918
Q	1918-1944
R	Mid-twentieth century:: ca. 1945-1990
S	Contemporary from 1990