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- Labor discipline 1
- Labor disputes-Costa Rica 1
- Labor disputes-El Salvador 89
- Labor disputes-El Salvador-1983 1
- Labor disputes-El Salvador-1984 2
- Labor economics 1
- Labor law 1
- Labor mobility-Law and legislation-El Salvador 1
- Labor movement 1
- Labor movement-Venezuela 1
- Labor policy-El Salvador 8
- Labor policy-El Salvador-1988 1
- Labor policy-El Salvador-2004 1
- Labor productivity 5
- Labor productivity-El Salvador 1
- Labor supply 2
- Labor supply-El Salvador 6
- Labor supply-Socioeconomic aspects-El Salvador 1
- Labor unions 1
- Labor unions-El Salvador 83