Perry, Alan T (1992). "(Book Review) Collected Works of Erasmus". Arc: The Journal of the Faculty of Religious Studies, McGill University. 20: 105. Retrieved 10 June 2023.
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An example is the Zibaldone da Canal merchant's manual held at the Beinecke Library, which dates from 1312 and contains hand-drawn diagrams of Venetian ships and descriptions of Venice's merchant culture.