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- Coffee-Harvesting-El Salvador-1982 2
- Coffee-Machinery 1
- Coffee-Processing 1
- Coffee-Production-El Salvador 1
- COIL 1
- Coinage 1
- Coinage, international 1
- Colegio Normal de Señoritas 1
- Colegio Sagrado Corazón de Jesús 1
- Colegios profesionales-Guatemala-1810 1
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- Colera porcino-Prevención 1
- Collective bargaining-El Salvador-1949 1
- College administrators-El Salvador 1
- College and school drama-El Salvador 2
- College graduates 1
- College students 11
- College students-El Salvador-20th century 9
- College students-Guatemala 1
- College students-Political activity-El Salvador-2005 1