For administrative queries, please contact Ms C.H.M. Verhaar:
Visiting address:
Sterrenwachtlaan 11
2311 GW Leiden
Postal address:
Postbus 778
2300 AT Leiden
T: +31-(0)71-527-7748
E: gro.r1695287530ivnk@1695287530tcatn1695287530oc1695287530
To contact the Secretary of the Board of the Society, please send an email to gro.r1695287530ivnk@1695287530draob1695287530.