27th International Navigation Congress, Osaka - 20/26 May 1990. Section 1. Inland waterways and ports (for commercial and pleasure navigation): subject 1. Improvements in inland waterway traffic management by using modern methods
(1990). 27th International Navigation Congress, Osaka - 20/26 May 1990. Section 1. Inland waterways and ports (for commercial and pleasure navigation): subject 1. Improvements in inland waterway traffic management by using modern methods. PIANC = AIPCN: Brussel. ISBN 2-87223-008-4. 116 pp.
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