Labor unions History 20 Officials and employees 8 Labor leaders 7 Mexican American migrant agricultural laborers 5 Migrant agricultural laborers 5 Organizing 5 more ... Labor movement 4 Coal miners 3 Women labor leaders 3 Women labor union members 3 Working class 3 African Americans 2 Labor 2 Political activity 2 Social conditions 2 Social life and customs 2 Women social reformers 2 African American communists 1 Agricultural laborers 1 Automobile industry workers 1 Baseball players 1 Bilingual 1 Capitalists and financiers 1 Civil rights 1 Civil rights movements 1 Civil rights workers 1 Clothing workers 1 Coal trade 1 Economic conditions 1 less ...