De duwvaart in de havens = Tugboats for thrust propulsion (as opposed to traction) of tows in harbours
Soyuzov, A.A. (1964). De duwvaart in de havens = Tugboats for thrust propulsion (as opposed to traction) of tows in harbours, in: 4de internationaal havenkongres: Antwerpen, 22-27 juni 1964 = 4me congrès portuaire international: Anvers, 22-27 juin 1964 = 4th international harbour conference: Antwerp, June 22nd-27th 1964 = 4. internationale Hafentagung: Antwerpen, 22.-27. Juni 1964. pp. 746-749
In: (1964). Verslagboek van het vierde Internationaal Havenkongres, Antwerpen, 22-27 juni 1964. KVIV: Antwerpen. 1155, XLI pp., meer
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