The list could almost be endless, with everybody pitching in with with books and references which have added to there knowledge. You might find a small bit of usefull info in an obscure place that you can use.
Bruhn isnt an easy ride, but it teaches you everything you need to know. Mike Niu did his degree in hydraulics because he wasn't judged clever enough to to aerospace (his ideal). After he completed he wanted to get into the industry(before he joined Lockheed) do he read Bruhn from back to front and did all the questions. Twice.
He then learned more by spending all his time in the lockheed library reading reports during lunchtimes to get enough info to write his first book (10 years work).
It is and will continue to be the first and last book of aero stress engineers because it contains everything you need to know. Elmer didn't invent the wheel, he just put it in a decent shop window.