title: Photographic science and microdensitometry in X-ray diffraction data collection.
mesh_terms: D001704:Biopolymers; D010781:Photography; D011506:Proteins / Q000032:analysis*; D014961:X-Ray Diffraction / Q000295:instrumentation* / Q000379:methods
chemical_list: D001704:Biopolymers; D011506:Proteins