Gupta, B.M., Suresh Kumar, H.K. Khanna, and T.K. Amla. 1999. “IMPACT OF PROFESSIONAL AND CHRONOLOGICAL AGE ON THE PRODUCTIVITY OF SCIENTISTS IN ENGINEERING SCIENCE LABORATORIES OF CSIR”. Malaysian Journal of Library and Information Science 4 (1):103-7. http://mjlis.um.edu.my/index.php/MJLIS/article/view/6756.