Over half a million educative instruction sheets and other material have been produced by the new printing plant set up in Limite, Congo, about 15 kilometres from Leopoldville. The "Centre de Production" was established by United Nations Educational, Scientific and Cultural Organization (UNESCO) in co co-operation with the Ministry of Education, United Nations Children's Fund (UNICEF) and United Nations Civilian Operations in the Congo (ONUC).

Pierre Yenga (left) at the Gestelith offset press and Roger Ade (Haiti), UNESCO printing expert (right) at the mercury light photo copy apparatus. Ade supervises the printing plant with the assistance of four Congolese trainees, including Mr. Xenga.