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