Elon?
Chpt. 24
Project Mars
by Wernher von Braun
Project Mars - A Technical Tale by Wernher von Braun, translated by Henry J. White, written 1948 and published in translation in 1953. A Science Fiction story encapsulating calculations and arguments to show practicality of manned missions to Mars and a Mars colony. With colour illustrations and a technical appendix.
https://ia801901.us.archive.org/6/items/ProjectMars/MarsProject.pdf