Vijayalakshmi, Prof. Ch., and Mrs. K. V. Shailaja. “Development of a Training Package in School Mathematics (DTPSM) for Pre-Service and In-Service Teachers”. INDIAN EDUCATIONAL REVIEW, vol. 50, no. 2, July 2012, pp. p. 111-115, http://14.139.250.109:8090/index.php/ier/article/view/2558.