Nicholson, J.

Hawes, H., Nicholson, J. & Bonati, G., 1991. Children, health and science : child-to-child activities and science and technology teaching, (Science and technology education document series no. 41) Paris, France: UNESCO, Division of Science, Technical and Environmental Education. Available at: https://nl.ircwash.org/sites/default/files/Hawes-1991-Children.pdf.