International Union of Crystallography (IUCr)
European Crystallographic Association (ECA)
Australia & New Zealand
Society for Crystallographers in Australia and New Zealand (SCANZ)
Czech Rep. & Slovakia
Czech and Slovak Crystallographic Association (CSCA)
Egypt
The Egyptian Society Of Crystallography and Applications (ESCA)
France
Association Francaise de Cristallographie (AFC)
Germany
German Crystallographic Association (DGK)
Netherlands
Nederlandse Vereniging voor Kristallografie (NVK)
Switzerland
Swiss Society for Crystallography
UK
British Crystallographic Association (BCA)
USA
American Crystallographic Association (ACA)
...to be continued...