Discrete tools are fairly easy. On the other hand, I think a lot of people here would laugh at the "text book" for the introductory FORTRAN course I took at said school.
Of course, you were struggling with fairly primitive tools at the time as well. Made a typo? Time to beg the grad students running the facility for some more compute cycles.
Although it's out of print I don't immediately see a full copy online. https://www2.seas.gwu.edu/~kaufman1/FortranColoringBook/Colo...