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FRANK, Robert H., BERNANKE, Ben S.. (2004). Principles of macro economics . New York: The McGraw-Hill Companies.

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FRANK, Robert H., BERNANKE, Ben S.. Principles of macro economics. New York: The McGraw-Hill Companies, 2004. Text.

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FRANK, Robert H., BERNANKE, Ben S.. Principles of macro economics. New York: The McGraw-Hill Companies, 2004. Text.

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FRANK, Robert H., BERNANKE, Ben S.. Principles of macro economics. New York: The McGraw-Hill Companies, 2004. Print.