The Glashistorisk Selskab Holbæk (http://www.glashistoriskselskab.dk/) are currently running a huge exhibition of Jacob Bang's glass at the Holmegaard museum, and their website is carrying the catalogue for it. It's amazing to see all this glass gathered together in one place.
It's in .pdf format, and 141 pages long (it's all images; 2-3 per page)
It can be viewed HERE (http://www.glashistoriskselskab.dk/images/stories/JacobBangOgGlasset.pdf)