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- Rafael (Arcángel) 2
- Railroad law 2
- Railroads 13
- Railroads-Communications systems 1
- Railroads-Construction 3
- Railroads-Construction-El Salvador-19th century 1
- Railroads-El Salvador-19th century 2
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- Rameau, Juan 1
- Ramírez, Pedro M. 7
- Ramos Carrión, Miguel, 1848-1915 1
- Rampolla del Tindaro, Mariano, 1843-1913 1