For administrative queries, please contact I.W.C. Hogervorst:
Visiting address:
Sterrenwachtlaan 11
2311 GW Leiden
Postal address:
Postbus 778
2300 AT Leiden
T: +31-(0)71-527-7748
E: gro.r1760409349ivnk@1760409349tcatn1760409349oc1760409349
To contact the Secretary of the Board of the Society, please send an email to gro.r1760409349ivnk@1760409349draob1760409349.