G.K. Lieten, Professor of Child Labour, studies at the University of Amsterdam and at the International Institute of Social History in Amsterdam.
Olga Nieuwenhuys a social anthropologist, was a senior research fellow at the Department of Geography, Planning and International Development Studies,?University?of?Amsterdam,?The?Netherlands.
Loes Schenk-Sandbergen was an associate professor of sociology and anthropology?at?the?University?of?Amsterdam.