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- Dewey Decimal Classification (DDC) (18)
- 100 Philosophy, parapsychology and occultism, psychology (18)
- 174 Occupational ethics (18)
- 174.1 Clergy (1)
- 174 Occupational ethics (18)
- 100 Philosophy, parapsychology and occultism, psychology (18)
Number of items at this level: 0.