Field cooperated with the grand information efforts of Belgians Paul Otlet and Henri La Fontaine who had founded the Institut International de Bibliographie (IIB) in Brussels in 1895, later renamed as (in English) the International Federation for Information and Documentation (FID). In its early years the Concilium operated as an affiliate of the IIB. Field is credited with persuading Otlet and La Fontaine to adopt the 75 x 125 mm card size. He was also responsible for developing at the Concilium the Zoology sections of the Universal Decimal Classification.
