from 1963, c.i.d.a. began to produce, every three years, an "annuaire des arachnologistes mondiaux" - a list of active workers in the field of arachnology, cross-referenced by country and research interests - and a "liste des travaux arachnologiques" - an annual list of recent scientific publications in this field. following frankfurt, further international meetings were held on a regular three year cycle beginning with the "ivème congrès international d’arachnologie" in 1968 in paris, and thereafter known as the "international congress of arachnology".