Blaeu, Willem Janszoon. "Delflandia, Schielandia, et insulae trans Mosam illis objacentes ut sunt Voorna, Overflackea, Goerea, Yselmonda, etc." Map. Amsterdam: Exc. Guilj. Blaeuw, 1635. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:cj82kr398 (accessed April 25, 2024).