1. The Amazon River Modeled as a Giant Snake
2. Tradeoff Decisions in System Design
3. Burden, P. D. (1996). The Mapping of North America: A List of Printed Maps 1511–1670, vol. 1, no. 47. Raleigh Publications, Rickmansworth, Hertfordshire, UK. ISBN 0952773309.
4. California as an Island in Maps. (2011) Maps from the Glen McLaughlin collection of California as an Island, Stanford University Libraries, August 2021. https://exhibits.stanford.edu/california-as-an-island.
5. The Isles of San Felix and San Nabor