Ersatz traditioneller Schrauben durch andere Antriebsmittel bei grösseren Hafenschleppern = Replacing traditional propellers by other propelling means in heavy tugboats
Helm, K.; Moeckel, W. (1958). Ersatz traditioneller Schrauben durch andere Antriebsmittel bei grösseren Hafenschleppern = Replacing traditional propellers by other propelling means in heavy tugboats, in: Verhandelingen, besprekingen, verslagen en besluiten van het Derde Internationaal Havenkongres, Antwerpen, 15-21 juni 1958 = Papers, discussions, reports, and conclusions of the Third International Harbour Congress, Antwerp, June 15th-21st 1958. pp. 233-246
In: (1958). Verhandelingen, besprekingen, verslagen en besluiten van het Derde Internationaal Havenkongres, Antwerpen, 15-21 juni 1958 = Papers, discussions, reports, and conclusions of the Third International Harbour Congress, Antwerp, June 15th-21st 1958. Quadrilingual edition. KVIV: Antwerpen. 541 pp., more
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