I have seen several proofs of Sylow's Theorem based on Wielandt's method. Everyone gives credit to Wielandt's proof of Sylow's theorem, but ironically everyone puts their own spin on it.
Where can I find the original Wielandt's proof of Sylow's theorem?
At the end of the Wikipedia page for that, it gave this citation: Wielandt, Helmut Ein Beweis für die Existenz der Sylowgruppen. (German) Arch. Math. (Basel) 10 1959 401–402.
And then I found this scanned page that mentions that paper in a condensed way.
My German is rusty, but I can kind of see that it says something like