Versions - Principles of economics

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  1. 1
    Principles of economics

    Principles of economics by Ruffin, Roy , 1938-, Gregory, Paul R.

    Published 1997
  2. 2
    Principles of economics

    Principles of economics by Ruffin, Roy , 1938-, Gregory, Paul R.

    Published 1986
  3. 3
    Principles of economics

    Principles of economics by Ruffin, Roy , 1938-, Gregory, Paul R.

    Published 1993

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