Letter	Sub heading
A	Icelandic studies generally
B	Icelandic language
BM	Old Icelandic language, 1100-1500
C	Icelandic literature generally
E	Old Norse and medieval Icelandic literature, to 1550
H	Literature of the reformation and age of autocracy, 1550-1798
N	Literature of the age of romanticism, 1798-1879
P	Literature of the age of realism, 1879-1918
R	Contemporary literature, from 1918
XA	Icelanders in North America
XR	Icelandic literature of North America, from 1870
Z	Miscellaneous works and translations by Icelanders