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- Roads -- South Africa 1
- Roads -- South Africa -- Design and construction 1
- Robotics 2
- Robotics in medicine 1
- Robust control 1
- Rockets (Aeronautics) -- Nozzles 1
- role 1
- Roller compacted concrete 1
- Roobos tea 1
- Roofing -- Environmental aspects 1
- Roofing, Concrete 1
- Rooibos 3
- Rooibos tea 7
- Rooibos tea -- Biotechnology 2
- Rooibos tea -- Health aspects 3
- Rooibos tea -- Heat treatment 1
- Rooibos tea -- Marketing 1
- Rooibos tea -- Microbiology 1
- Rooibos tea -- Oxidation 1
- Rooting techniques 1