If you’re interested in a guide from the same era on more... direct forms of resistance, Bert Levy’s 1941 Guerrilla Warfare is a good read: https://epdf.pub/guerrilla-warfare6b67033a7460226f89666685f2...

(And even just Levy’s life story is quite a story all by itself: https://en.wikipedia.org/wiki/Yank_Levy)