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Changes in the status of seaports in the Western Niger Delta region of Nigeria
Omiunu, Francis G. I., (1986)
World shipping : an economic geography of ports and seaborne trade
Alexandersson, Gunnar, (1963)
The geography of the port of London
Bird, James, (1957)
Spatial aspects of development
Hoyle, Brian Stewart, (1974)
Transport and development
Hoyle, Brian Stewart, (1973)
Seaports and development in tropical Africa
Hoyle, Brian Stewart, (1970)