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ลำดับที่	LC	คำอธิบาย
61		Trade unions. Labor unions. Workers' associations
62		Work groups. Team work in industry. Quality circles
63		Other Including business consultants, capacity, size of industries, etc.
64		Employers' associations
65		Industrial sociology. Social conditions of labor
66		Industrial relations
67		Cost and standard of living
68		Social insurance. Social security. Pension
69		Economic growth, development, planning
70		Vocational rehabilitation. Employment of people with disabilities
71		Industrial hygiene. Industrial welfare
72		Labor policy. Labor and the state
73		Labor in politics. Political activity of the working class
74		Professions (General). Professional employees
75		By industry or trade
76		By region or country
77		Agricultural industries
78		Special industries and trades
79		Energy industries. Energy policy. Fuel trade
80		Mineral industries. Metal trade
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