The interior door panels need to be removed, then each fastner can be unbolted. The door handles are held in place with a sliding plate under the access panel under the weather strip.
There are no "clip on" fastners so look for the bolts. On my 52 I had to remove the rear seat to get to the lower bolts for the side trim.
Each fastner is different so make sure you know where they go when you re-install the trim.
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