Walker,Hugh D. (1971). Market power and price levels in the ethical drug industry. Indiana University Press.
Styl ChicagoWalker,Hugh D. Market Power and Price Levels in the Ethical Drug Industry. London: Indiana University Press, 1971.
Citace podle MLAWalker,Hugh D. Market Power and Price Levels in the Ethical Drug Industry. Indiana University Press, 1971.
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