Dennis Ritchie's PhD Dissertation [pdf](archive.computerhistory.org)
archive.computerhistory.org
Dennis Ritchie's PhD Dissertation [pdf]
https://archive.computerhistory.org/resources/access/text/2020/05/102790971/Ritchie_dissertation.pdf
3 comments
Somewhat related: How did Dennis Ritchie produce his PhD thesis? A typographical mystery (2022) [pdf] (477 points, 2023, 168 comments) https://news.ycombinator.com/item?id=35177110
Background discussion:
https://computerhistory.org/blog/discovering-dennis-ritchies...
Typing an equation-heavy PhD dissertation in the days before word processors or tools like LaTeX were available must have been only slightly less involved than the research being written up.