Lost Prehistorica & Lost Prehistorica. Lost Creatures - Combined
Unknown
Fate of Fools
Dark Flame
PZO9432 Kobolds of Golarion
Protodimension Magazine #19 (Spring 2014)
Manual of the Planes
Jeff Grubb
Fiend Folio
Eric Cagle
Planar Handbook
Bruce R. Cordell & Gwendolyn F.M. Kestrel