http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Fink powder diffraction file retrieval index for inorganic compounds
Fink index to the powder diffraction file
Joint Committee on Powder Diffraction Standards
American Society for Testing and Materials
Compiled in cooperation with the American Society for Testing and Materials and similar organizations.