"Notes of 31 lectures and six question-and-answer sessions given and held in various locations from 9 February 1906 to 17 March 1907" -- p. 3.
"German bibliography (GA) No. 97" -- p. 4.
The Christian mystery by Rudolf Steiner. ISBN 9780957818903. Published by Completion Press in 2000. Publication and catalogue information, links to buy online and reader comments.