books

Books about Helna:

booksMetropolis : One Stich At a Time - The Tapestry of Helna Hernmarck; Tucker Robbins and His Modern Primitivism;... by Akiko Busch, Alex Ulam and Matt Steinglass (2000)

booksSt. Helna by Octave Aubry (1936)

wiki

Wiki information Helna:

Succubus Helna
Musical Artist