These are chat archives for Fortran-FOSS-Programmers/General-Discussion
For such an old language, Fortran really seems to suffer from lack of good resources and mature libraries to help in writing Fortran. Like, I had to wrap a few functions from the R-math libraries (written in C) to get performant probability quantile functions.
I found Fortran For Scientists and Engineers helpful. It's very basic (and has weird things like nested loops in a suboptimal order, but I guess even the lowest optimization levels in a compiler take care of that?), but that makes it a fast read and great for the target audience of scientists/engineers.