Note: This calendar view maps the number of captures of https://publications.iiep.unesco.org/Educational-Planning/Information-systems/Definici%C3%B3n-un-sistema-informaci%C3%B3n-al-servicio-del-proceso-planificaci%C3%B3n-educacional, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.