Rene Descartes, Discourse on the Method of Rightly Conducting the Reason and Seeking in the Sciences, 1941, id1773, Box: 1, Item: 13. Emanuel Haldeman-Julius Big Blue Books and Larger Books Collection, SC-EHJB. Special Collections & Archives. https://findingaids.csun.edu/repositories/2/archival_objects/18433 Accessed June 26, 2026.