Morgan, F. W., & Bird, J. (1961). Ports and harbours (2nd ed.). London: Hutchinson University Library.
Παραπομπή Chicago StyleMorgan, F. W., and James Bird. Ports and Harbours. 2nd ed. London: Hutchinson University Library, 1961.
Παραπομπή MLAMorgan, F. W., and James Bird. Ports and Harbours. 2nd ed. London: Hutchinson University Library, 1961.
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