'69 Dart - Window removal

Hey Guys, can anyone explain to me how I get the front windows and wing window frames out of the front doors? I have everything else out, regulator, latch, window tracks, etc.....but I cannot get the window to unlatch from the wing window and I can't get the wing frame out. All is loose, except I feel an internal bracket just below the wing window and see a smooth rivet on the upper painted area of the door on the inside?

Thxs, Tom](*,)