Depending on what your computer capabilities are and what software you have installed.
The method I use is easy and fast. I'm using an IMAC and photoshop.
1. Enlarge the best copy of the image found and make a screen print.
2. Open the screen print in photoshop.
3. Crop and otherwise enhance the image with the various filters/options available on photoshop.
There may be other programs that function as photoshop. I don't know. But this is what I use with fairly consistent and legible results. (Of course, if the original is poor quality...the challenge remains).
Nomi Fiszenfeld Waskberg
Fiszenfeld, Braun, Zyngier, Wolkowicz, Elwig, Rygiel, Przytyk,
Frydman, Burman, Rambaum, Bijak, Gryzmek, Klajnbard,
Waksberg, Roszenblat, Krys, Slupska