You can probably find all the info needed at
http://graflex.org/.
A couple suggestions follow regarding your plans on using/developing the film. Developing sheet film is not difficult, but it is different and harder than processing the 35mm film you may have used in class. I understand that the film in a film pack adapter is thinner than normal sheet film and is supplied in a long continuous strip that would complicate the process further. If you would really like to see if there are any pictures taken by your grandfather in the pack, I would suggest trying to find a photographer experienced with developing this type of film even if it means not shooting the rest of the pack. (It's probably fogged as a result of age anyway and with no experience using the camera, you might inadvertently do something wrong that would expose and ruin the film. I wouldn't chance that with this particular pack.)
You might also try to pick up a double-sided sheet film holder for this camera. I believe it takes special slotted Graflex holders. (Someone correct me if I'm wrong.) They would be easier to use starting out than the bag magazine.
Have fun with it.
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