Speech on magic as a religious phenomenon, presented on the occasion of the acceptance of the special chair of sociology of religion and ethnology at the State University of Utrecht

4 Quarter Sheet with various articles about the South Pacific, including New Guinea, issued by the South Pacific Commission

A clear analysis of already published reports on the agricultural development region of Japen

Overview of some data of the Subsection. Teminaboean Ajamaroe and in particular the area for soil research, creation of a regional plan and other work, including 2 maps

Research and exploitation calculating 240 mixed horticulture near Manokwari with an average size of about 5 ha.

Study and report on regional plan development in New Guinea, particularly in the area Ajamaroe

Report, commissioned by the government of New Guinea in June 1953 - June 1954, the presence and causes of the depopulation in the area of Marind Anim

Description of the Nimboran area, the population, an the local agricultural development resuling from the Nimboran development project.

Description of the plan to open up the agricultural Grime-Sekolie area, near Hollandia, and establishment of a full-mechanically driven farm for rice and peanuts with notes on the budget