How do you remove door glass

How do you remove the door glass out of a 71 Dart hard top? I pulled the pin out of the regulator and freed it. Pulled the rubber stopper out of the top of the vent window track and unbolted the rear track. It seems to be locked into the front track. Do you have to unbolt the front track/vent window as well, I would think there is an easier way, but I'm not finding it. help!