Henry Cornelius Agrippa - Three Books Of Occult Philosophy Book I
Henry Cornelius Agrippa - Occult Philosophy and Magick Book I
William Wynn Westcott - Numbers Their Occult Power and Mystic Virtues
John Frederick Charles Fuller - The Star in the West A Critical Essay on the Works of Aleister Crowley
Kopp Hermann - Die Alchemie in Alterer und Neuerer Zeit (1886,in German)
Mourant Brock - Rome Pagan and Papal