The Recollections and Reflections of J. R. Planché 2 Volume Set: The Recollections and Reflections of J. R. Planche: A Professional Autobiography Volume 2 (Cambridge Library Collection - Music)
Studies in Occultism; A Series of Reprints from the Writings of H. P. Blavatsky No. 1: Practical Occultism—Occultism versus the Occult Arts—The Blessings of Publicity
Escalating Commitment als Ursache gescheiterter D.V.-Projekte: Methoden und Werkzeuge zur Deeskalation (Informationsmanagement und Computer Aided Team)
