https://books.google.co.id/books?hl=en&lr=&id=Z8hWAgAAQBAJ&oi=fnd&pg=PT6&dq=Multimodal+Transport+Systems&ots=W96hAfopkL&sig=1KA8HrkG4OWGdzaWIQLlFwWVI1g&redir_esc=y#v=onepage&q=Multimodal%20Transport%20Systems&f=false

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