Berkowitz, Gerald M.
American drama of the twentieth century
Longman, 1994
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Readings in twentieth-century European history
edited by Alexander Baltzly, A. William Salomone
Appleton-Century-Crofts, 1950
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Readings in Twentieth-Century European History
edited by Alexander Baltzly
Appleton-Century-Crofts, Inc, 1950
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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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