Gustave Geley has written:
'De l'inconscient au conscient'
'De l'inconscient au conscient' -- subject(s): Conscience,
Inconscient
'Clairvoyance and materialisation' -- subject(s): Clairvoyance,
Materialization, Parapsychology
'L'Etre subconscient' -- subject(s): Subconscience,
Psychophysiologie, Recherche psychique