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Subjects
- Radar -- instrumentation1
- Radiation Effects1
- Radiation Injuries3
- Radiation Injuries -- pathology1
- Radio Frequency Identification Device1
- Radioactive Fallout -- adverse effects1
- Radiography2
- Radiology -- history1
- Radiology Department, Hospital3
- Railroads3
- Rain1
- Recreation13
- Red Cross14
- Red Cross -- history4
- Reference Standards2
- Rehabilitation2
- Reichsforschungsrat (Germany)1
- Relaxation1
- Religion4
- Republic of Belarus1