Books by Timothy D. Tregarthen:
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Tregarthen, Timothy D.: Principles of Economics (derived from Creative Commons licensed edition published by Flat World Knowledge, ca. 2011), also by Libby Rittenberg (PDF at saylor.org)- Tregarthen, Timothy D.: Principles of Macroeconomics (derived from Creative Commons licensed edition published by Flat World Knowledge, ca. 2009), also by Libby Rittenberg (PDF at saylor.org)
- Tregarthen, Timothy D.: Principles of Microeconomics (derived from Creative Commons licensed edition published by Flat World Knowledge, ca. 2009), also by Libby Rittenberg (PDF at saylor.org)
Find more by Timothy D. Tregarthen at your library, or elsewhere.