V. Koval, Aleksandr. «Organization of Trade Ports Activity Management in Europe at the End of the 19th and Beginning of the 20th Century». Revista San Gregorio 1, no. 30 (abril 30, 2019). Accedido noviembre 22, 2024. https://revista.sangregorio.edu.ec/index.php/REVISTASANGREGORIO/article/view/903.