Unger, R. W. (2023). Chapter Ships, shipping, technological change and global economic growth, 1400-1800. Firenze University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnger, Richard W. Chapter Ships, Shipping, Technological Change and Global Economic Growth, 1400-1800. Florence: Firenze University Press, 2023.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnger, Richard W. Chapter Ships, Shipping, Technological Change and Global Economic Growth, 1400-1800. Firenze University Press, 2023.
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