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Section13.5References and Suggested Readings

[1]
  
Hungerford, T. W. Algebra. Springer, New York, 1974.
[2]
  
Lang, S. Algebra. 3rd ed. Springer, New York, 2002.
[3]
  
Rotman, J. J. An Introduction to the Theory of Groups. 4th ed. Springer, New York, 1995.