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   [ สังคมศาสตร์ ( Social Sciences ) ] back
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ลำดับที่LC คำอธิบาย
1 Social insurance. Social security. Pension
2 Economic growth, development, planning
3 Vocational rehabilitation. Employment of people with disabilities
4 Industrial hygiene. Industrial welfare
5 Labor policy. Labor and the state
   [แสดง 5/5 รายการ]