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Slavery -- Moral and ethical aspects -- United States -- History -- 19th century
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Slaves -- Emancipation -- Maryland
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Society of Friends -- Pennsylvania -- Lancaster County -- History -- 19th century
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Society of Friends -- Pennsylvania -- Philadelphia -- History -- 20th century
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Society of Friends -- United States -- History -- Civil War, 1861-1865
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South Carolina -- Politics and government -- 1775-1865
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Soviet Union -- History -- Revolution, 1917-1921 -- Art and the revolution
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Soviet Union -- Intellectual life -- 1970-1991
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Soviet Union -- Politics and government -- 1917-1936
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Soviet Union -- Politics and government -- 1985-1991
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Space race -- Press coverage -- History -- 20th century
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Space race -- United States -- History
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Spain -- Colonies -- America -- History -- 18th century
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Spain -- History -- Civil War, 1936-1939 -- Public opinion
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Spain -- Politics and government
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Spain -- Politics and government -- 17th century
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Spontaneous generation -- History -- 19th century
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Stein, Aurel, Sir, 1862-1943
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Stemons, James Samuel, b. 1870
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Stock, Frederick, 1872-1942
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