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学科
- Work[remove]8
- Conduct of life2
- Especially for youth2
- For Adventist youth2
- Success2
- Youth -- Conduct of life2
- Children -- Employment1
- Children of clergy1
- Christians -- Conduct of life1
- Diamond mines and mining -- Africa -- History1
- Editorials1
- Longevity1
- Play1
- Talks with juniors1
- The art of living when you're young1
- Trees -- California1
- Work ethic1
- Youth -- Attitudes1
- Youth -- Work ethic1