Lipsey,Richard G, & Peacock,Edward. (1963). An introduction to positive economics (5 & 7.). English Language Book Society.
Dyfyniad Arddull ChicagoLipsey,Richard G, and Peacock,Edward. An Introduction to Positive Economics. 5 & 7. London: English Language Book Society, 1963.
Dyfyniad MLALipsey,Richard G, and Peacock,Edward. An Introduction to Positive Economics. 5 & 7. English Language Book Society, 1963.
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