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- Race relations2
- Raffles, Thomas Stamford, Sir, 1781-18263
- Railroads--Euphrates River Valley2
- Rajasthan (India)--History2
- Rationalism28
- Rationalism--Controversial literature--Early works to 18004
- Rationalism--Early works to 18002
- Rationalism--History6
- Ravenna (Exarchate)2
- Ravenscroft, John Stark, 1773-18302
- Ravenstein, Ernest George, 1834-191319
- Raymond, of Peñafort, Saint, 1175?-12755
- Reason2
- Recollets--Colombia2
- Red Sea2
- Redemption14
- Redemption--Biblical teaching2
- Redemption--Early works to 18006
- Redemption--History of doctrines4
- Reed, Joseph, 1741-17852