@phdthesis{ Solr-UP-99796217609085112, title = {Developing productive thinking of a mentally retarded child}, author = {Tiambeng, Lourdes Cornelia Lazarte 1946-}, editor = {Adorio, Mercedes P.}, address = {Quezon City}, publisher = {College of Education, University of the Philippines Diliman}, year = {1977}, school = {Thesis (Master of Arts in Teaching Special Education - Mental Retardation)--University of the Philippines, Diliman}, note = {Vita.}, }