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Signalbuch (S.B.)
(1952)
Funkverkehrsbuch (F.V.B.) : amtliche deutsche Ausgabe
(1951)
Econometric modelling of world shipping
Beenstock, Michael, (1993)
British nationalised shipping 1947-1968
Clegg, William Paul, (1969)
Contagion through learning
Steiner, Jakub, (2008)
Attention please!
Gossner, Olivier, (2018)