Noponen, H. (1993). Trading industries, trading regions: International trade, American industry and regional economic development. Guilford Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNoponen, Helzi. Trading Industries, Trading Regions: International Trade, American Industry and Regional Economic Development. Guilford Press, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNoponen, Helzi. Trading Industries, Trading Regions: International Trade, American Industry and Regional Economic Development. Guilford Press, 1993.
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