27th International Navigation Congress, Osaka - 20/26 May 1990. Section 1. Inland waterways and ports (for commercial and pleasure navigation): subject 3. Multi-purpose waterways
(1990). 27th International Navigation Congress, Osaka - 20/26 May 1990. Section 1. Inland waterways and ports (for commercial and pleasure navigation): subject 3. Multi-purpose waterways. PIANC = AIPCN: Brussel. 134 pp.
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