Schapiro, J. Salwyn
The world in crisis : political and social movement in the twentieth century
McGraw-Hill, 1950
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Button, John
The radicalism handbook : a complete guide to the radical movement in the twentieth century
Cassell, 1995
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Margolies, Edward
Native sons : a critical study of twentieth-century Negro American authors / Edward Margolies
Lippincott, 1969
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Woodham, Jonatham M.
Twentieth-Century design
Oxford University Press, 1997
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Chant, Christopher
Twentieth century war machines
London: Chancellor Press, 1999,
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