68 Dart 4 door. Passenger side doors inoperable.

Thanks guys. Sprayed everything down with some penetrating oil as best I could. Let it sit for a while then took a soft face dead blow hammer to lightly tap around the areas of the latch. Then got inside and pulled the handle while giving it a good solid shoulder. Once open I got some oil directly on the latch and worked them a hundred times or so from both handles.