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Principles of microeconomics
Ruffin, Roy J.; Gregory, Paul R. - 1997 - 6. ed
Persistent link: https://www.econbiz.de/10000585001
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Principles of macroeconomics
Ruffin, Roy J. - 1997 - 6th ed
Persistent link: https://www.econbiz.de/10000585006
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Principles of economics
Ruffin, Roy J.; Gregory, Paul R. - 2001 - 7. ed
Persistent link: https://www.econbiz.de/10001501769
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Principles of microeconomics
Ruffin, Roy J. - 2001 - 7. ed
Persistent link: https://www.econbiz.de/10001501770
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Essentials of economics
Gregory, Paul R. - 2005 - 6. ed., internat. ed.
Persistent link: https://www.econbiz.de/10001971359
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Essentials of economics
Gregory, Paul R. - 2002 - 5. ed
Persistent link: https://www.econbiz.de/10001581643