documents related to the history of mineralogy and crystallography
Krantz crystallography catalogs
catalogs related to crystallography and crystal models as published by Dr. A. Krantz and later Dr. F. Krantz, Rheinisches Mineralien-Kontor, Bonn
Krantz crystal model sets
Krantz crystal model sets are sorted by material (wood, glass, cardboard) and arranged by decreasing number of models in each set, and indicated in which catalog(s) it is described