00505nam a2200133Ia 4500008004100000040001700041082002800058110004100086245007400127260002600201300000900227500008500236650005000321190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta372.2410954bO69E  aOperation Research Group (New Delhi) 0aEvaluation of operation blackboard for Himachal Pradeshbdraft report  aNew DelhibORGc[n.d]  a80p.  aSubmitted to the Department of Education, Ministry of Human Resource Development  aBlackboards; Schools-Furniture, equipment etc