@book{87126,
	author = {All-European Conference for Directors of National Research Institutions in Education, and Carelli, M. Dino. and Unesco Institute for Education.},
	title = {Educational research in Europe :},
	publisher = {Swets & Zeitlinger,},
	year = {1977.},
	address = {Amsterdam :},
	note = {Organized by the Unesco Institute for Education, Hamburg.}
}