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.r1788865173ivnk@1788865173tcatn1788865173oc1788865173
To contact the Secretary of the Board of the Society, please send an email to gro.r1788865173ivnk@1788865173draob1788865173.