Faires, Virgil Moring
Macmillan, 1965
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Mott, Robert L., author
Pearson Prentice Hall, 2006
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Movnin, M.
Moscow: Mir Publishers, 1975
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Wilson, Charles E., author
Prentice-Hall, 1997
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Jain, Rajendra K., author
Khanna Publishers, 1983
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