Forward, William, Editorial Notes, in Forward, William, Wolpert, Andrew, The Quest for the Grail, The Golden Blade, 47, Floris Books, Edinburgh, 1994, 9-11

Steiner, Rudolf (Anthroposophie): , 127,13-128,2 (9), 170,13-173,6 (9-10), 240,3 (10), 502,12-502,14 (10)