Reference Sites for Demons:

Lesser Key of Solomon
(Also known as the Lemegeton or Ars Goetia)

Psuedomonarchia Daemonum
~Johann Weyer

The Grand Grimoire
~Alibek

Malleus Maleficarum
~ Heinrich Kramer

Luciferian Goetia
~Michael Ford

The Keys of Ocat
~ S. Connolly

Daemonolatry Goetia
~S. Connolly

Modern Demonolatry
~S. Connolly

Demonic Hierarchies
~S. Connolly