Journal of the Society for Psychical Research

Vol. 25-26, London 1929.

Gwendolyn Kelley Hack

Modern Psychic Mysteries at Millesimo Castle

Rider, London 1929.

Gwendolyn Kelley Hack

The Direct Voice in Italy (1 of 2)

Psychic Science, N. 4, Vol. 7, gennaio 1929, pp. 272-330.

Gwendolyn Kelley Hack

The Direct Voice in Italy (2 of 2)

Psychic Science, N. 1, Vol. 8, aprile 1929, pp. 9-26.