Cambridge Crystallographic Data Center (CCDC)
Cambridge Crystallographic Data Centre
Database for organic and metal-organic compounds studied by x-ray and neutron Diffraction
Cambridge Structural Database System
ICSD for WWW
Inorganic Crystal structure database
Inorganic Crystal Structure Database
Prequest
format data for Quest at Cambridge Structural database System
Quest
Crystallographic database at Cambridge Structural database System
World Directory of Crystallographers
@ IUCr UK