Genres
- Aeronautics, Commercial
- Agricultural laborers
- Building trades
- Chemical industry
- Chemical workers
- Child labor
- Civil service
- Clerks
- Coal miners
- Coal mines and mining
- Commercial Aeronautics
- Congresses
- Construction industry
- Construction workers
- Employees
- Hours of labor
- International Labor Organization
- International Labor Organization. Textiles Committee
- Iron and steel workers
- Iron industry and trade
- Lumber trade
- Lumbering
- Lumbermen
- Metal trade
- Metal-workers
- Miners
- Personnel management
- Petroleum
- Petroleum industry and trade
- Petroleum workers
- Professions
- Steel industry and trade
- Textile industry
- Textile workers
- Transport workers
- Transportation
- Tropical crops
- Vocational guidance
- Woodworking industries
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About the author
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