Journal of the American Society for Psychical Research

Vol. 15, 1921.

Proceedings of the American Society for Psychical Research

Vol. 15, 1921.

Journal of the Society for Psychical Research

Vol. 20, London 1921.

Proceedings of the Society for Psychical Research

Vol. 32, London 1921.

Charles Robert Richet

Traité de métapsychique

F. Alcan, Paris 1922.

Journal of the Society for Psychical Research

Vol. 21, London 1923.

Proceedings of the Society for Psychical Research

Vol. 33, London 1923.