1. 1963  Stockholm, Sweden
2. 1965  Copenhagen, Denmark
3. 1967  June 15-16, Espo, Otnäs, Finland
4. 1969  January 9-11, Beito, Norway
5. 1971  Sweden
6. 1973  Denmark
7. 1975  June 16-18, Hyvinge, Finland Asanti, Löfgren, Tor Stubb
8. 1978  January 29-February 1 Röros, Norway William Schockley invited speaker
9. 1980  Sigtuna, Swedem
10. 1982  June 9-11, Helsingör, Elsinore, Denmark, L.D. Nielsen
11. 1984  June, Espoo-Helsinki, Finland
12. 1986  June 8-11, Jevnaker, Norway, Per Öhlckers
13. 1988  June 5-8, Saltsjöbaden, Sweden, Jens Tellefsen, Sture Petersson
14. 1990  June 17-20, Aarhus, Denmark, Otto Leistiko, Arne Nylandsted Larsen
15. 1992  Finland
16. 1994  June 12-15, Laugarvatn, Iceland, Hafliði P. Gíslason Viðar Guðmundsson
17. 1996  June, Trondheim, Norway
18. 1998  June 7-10, Linköping, Sweden, Göran Hansson, Per-Olof Holtz, Bo Serenius
19. 2001  May 20-23, Lyngby, Denmark
20. 2003  Tammerfors, Finland
21. 2005  August 18-19, Sundvollen, Norway, Terje Finstad, Andrej Kuznetsov, Bengt Svensson
22. 2007  July 2-6, Sweden, Anders Hallén
23. 2009  June, Reykjavik, Iceland, Sveinn Ólafsson and Einar Sveinbjörnsson
24. 2011  June 19-22, Fuglsøcentret, Denmark, Haraldur Páll Gunnlaugsson and Arne Nylandsted Larsen