Jayakrishnan Nair M. (2002). A comparative study of the approaches of programmed instruction and the ordinary classroom method in the achievement of mathematics of students at the higher secondary classes. Sree Sankaracharya University of Sanskrit.

Jayakrishnan Nair M. A Comparative Study of the Approaches of Programmed Instruction and the Ordinary Classroom Method in the Achievement of Mathematics of Students at the Higher Secondary Classes. Kalady: Sree Sankaracharya University of Sanskrit, 2002.

Jayakrishnan Nair M. A Comparative Study of the Approaches of Programmed Instruction and the Ordinary Classroom Method in the Achievement of Mathematics of Students at the Higher Secondary Classes. Sree Sankaracharya University of Sanskrit, 2002.