Rukminie Samaranayake, Mallika Introduction of school clusters in Sri Lanka/ Mallika Rukminie Samaranayake. - Paris : UNESCO: International Institute for Educational Planning, 1985. - ii, 81 p.; 30 cm. il., map., fot. - IIEP. Occasional papers; 67 . No. de Clasificación Universal Decimal: 37 (548.7) =20 RUK No.67.