| 8. | British Crystallographic Association | | | Includes information about the activities of its groups, conference information, index and introduction to its newsletter, and related links. img.cryst.bbk.ac.uk |
| 10. | European Crystallographic Association | | | Includes minutes and reports of its executive council and groups, conference information, related news and lists of officials and rules, as well as membership information www.ecanews.org |
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