↑ Jean-Jacques Aubert (2015). Federico Romanis; Marco Maiuro (eds.). "Trajan's Canal: River Navigation from the Nile to the Red Sea?". Across the Ocean: Nine Essays on Indo-Mediterranean Trade. Columbia Studies in the Classical Tradition. 41. Brill: 33–42. doi:10.1163/9789004289536_004. ISBN978-90-04-28953-6. ISSN0166-1302. S2CID127255583.
1 2 3 4 Henri Stuckle (1870). Interoceanic Canals, an Essay on the Question of Location for a Ship Canal Across the American Continent. A. Carr and Co.
↑ William Herbert Hobbs (1952). A Proposed Open-ditch and Tunnel Sea-level Ship Canal Across Honduras. XVII-th International Geographical Congress. Edwards Brothers.
↑ J.J. Williams (1870). Tehuantepec Railway And Ship Canal. Government of Mexico.
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