Gdynia from 1920 to 1939 : The building and development of the port against the background of the maritime policy of the II. Republic - Steyer, Donald; Mielczarek, Ryszard (. Studia maritima. - Szczecin : Wydawn. Naukowe Uniwersytetu Szczecińskiego, 1978-. - ISSN 0137-3587 5, 1985)