Doors Stuck Closed

On our recently acquired '68 T&C the only door that will open is the driver passenger.

The driver door button will press in but the door does not move. The passenger door button does not move at all. Same with the passenger rear.

Anybody have any tips to get the other doors open. Limited to no damage to the doors if possible please. It is a parts car so the more parts available to others the better.

Thanks.
Author: ma_mopar