1.
Des préjugés en astronomie ; Prejudices in astronomy
Infant mortality by municipality in the Netherlands, 1841-1939
Archives of the Holland Land Company representatives in the United States of America, document group 559
La lente émergence de l'enseignement secondaire laïque pour filles en Belgique (1864-1934)
Archives of the Holland Land Company representatives in the United States of America, document group 787