the symposium was jointly organized by the International Association of Hydrological Sciences (IAHS)and the International Association of Meteorology and Atmospheric Physics (IAMAP) and co-sponsored by the United Nations Educational, Scientific and Cultural Organization (UNESCO) ; edited by H.-J. Bolle, R.A. Feddes, J.D. Kalma
International Meeting of Representatives of Institutions and Experimental Schools Concerned with Second Language Teaching in Primary Education--Research and Development (1966 : Unesco Institute for Education)