Calvin, H. C., & Stuart, E. G. (1925). The merchant shipping industry. J. Wiley & Sons, inc.; Chapman & Hall, ltd..
Dyfyniad Arddull ChicagoCalvin, H. C., and E. G. Stuart. The Merchant Shipping Industry. New York : London: J. Wiley & Sons, inc.; Chapman & Hall, ltd., 1925.
Dyfyniad MLACalvin, H. C., and E. G. Stuart. The Merchant Shipping Industry. J. Wiley & Sons, inc.; Chapman & Hall, ltd., 1925.
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