Agosta-Meynier

Le Prestidigitateur. Gazette mensuelle des artistes professionnels et amateurs

N. 24, Paris, dicembre 1920.

Journal of the American Society for Psychical Research

Vol. 14, 1920.

Proceedings of the American Society for Psychical Research

Vol. 14, 1920.

Proceedings of the Society for Psychical Research

Vol. 31, London 1920.

Carlton

Twenty years of spoof and bluff

Herbert Jenkins ltd., London 1920.

Hereward Carrington

The physical phenomena of spiritualism, fraudulent and genuine

1920.

Paul D'Estrée

Pharmaciens centenaires: J.-B. Lanoix

Bulletin de la Société d'histoire de la pharmacie, N. 26, Vol. 8, 1920, pp. 181-188.

Alsdorf Donald Holmes

The Magic Art

Self published, 1920.

Bert Douglas

Masonic magical creations

Self published, Toronto 1920.

Alfred C. Gilbert

Knots and Splices with Rope-Tying Tricks

1920.