File talk:Canal do Cassiquiare.jpg

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The year of the survey[edit]

In the Wikipedia page on von Humboldt I read that the survey of the Casiquiare happened in the year 1800, not in 1799. Also, I would appreciate a bibliographical reference. Gianluca Gorni (talk) 16:41, 5 January 2024 (UTC)[reply]

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