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- Rocas Volcánicas 1
- Rochow-Müller Direct Synthesis 1
- rock 1
- Rock Leonés 1
- Rockefeller Foundation 1
- Rodent 1
- Roderick Nash y Joseph Michael Powell 1
- Rodilla 1
- Rodio [Rh (III)] – Recuperación 1
- Rodolfo Horner Torres 5
- Rodolfo Rafael Ramírez, 1874-1954 1
- Rodolfo Vázquez, 1956- 1
- Rodolphe Kreutzer, 1766-1831 1
- Rodrigo Garnica 1
- Rodrigo Ogaz Muñoz 5
- Roedor 1
- Rogers RT/duroid 5880 1
- Rogers RT/duroid 5880 1
- Rogue wave 1
- ROI 1