Drewry Shipping Consultants. (1995). Coal shipping and costs: Sea transport logistics, traffic patterns, trade prospects, infrastructure constaints and freight costs. Drewry.
Παραπομπή σε μορφή Chicago (17η εκδ.)Drewry Shipping Consultants. Coal Shipping and Costs: Sea Transport Logistics, Traffic Patterns, Trade Prospects, Infrastructure Constaints and Freight Costs. London: Drewry, 1995.
Παραπομπή σε μορφή MLA (9th εκδ.)Drewry Shipping Consultants. Coal Shipping and Costs: Sea Transport Logistics, Traffic Patterns, Trade Prospects, Infrastructure Constaints and Freight Costs. Drewry, 1995.
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