take the door cards off first.
Carefully lever the trim around the sides so the retaining clips come out of the door.
Then press the window winder plastic thing in to reveal the small pin which secures it to the winder knob. Carefully rotate the winder so you can see the pin and it will either fall out or you can push it out with long nose pliers. Don't lose this pin ! I use two sets of pliers, one to wedge the plastic ring away from the handle, the other to probe for the pin. Putting it back is a pain, but once you've done 4 doors, you'll have perfected your own method
Then remove the grab handle, two philips head screws underneath. easy
the door card then pulls out at the bottom and slides out from underneath the wood capping.
You then can access the three (4 ?) small phillips head screws that hold the bottom of the capping to the door.
You also have to unscrew the black locking knobs so the capping can slide over the locking wires at the back end of the doors.
Then the capping slides up as there are clips that hold the top of the capping to the inside of the door.
Good luck refurbishing, a few threads on this if you do a search. The varnish/poly coating used by BL in the 70's was one of the hardest substances known to man.
stu