- ISBN10 0880104155
- ISBN13 9780880104159
- Publish Date 1 February 1998 (first published September 1968)
- Publish Status Active
- Publish Country US
- Publisher Anthroposophic Press Inc
- Imprint SteinerBooks, Inc
- Edition 3rd Revised edition
- Format Paperback (US Trade)
- Pages 112
- Language English