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Subject
- United States. Congress4
- Economic aspects3
- Emigration and immigration3
- Foreign relations3
- Mexicans3
- Civil rights2
- Emigrant remittances2
- Foreign workers, Mexican2
- History2
- Agricultural laborers, Foreign1
- Border patrols1
- Boundaries1
- Committees1
- Conflict of laws1
- Debtor and creditor1
- Drug control1
- Drug traffic1
- Economic conditions1
- Economic development1
- Economic integration1