Some place kicking around here I still have some of those multi-ring binders that Kodak used to sell just stuffed with those soft cover 75 cent booklets full of photo info from the 1940's at least into the 1970's. One contains notch codes and processing info for all kinds of sheet film. Today it seems amazing just how many varieties of sheet film you could buy 50 years ago, and not just from Kodak. There was DuPont, Ansco, Ilford, Agfa, Gavaert...and each in a variety of inch and metric sizes.