Nurujjaman Laskar, and Dr. Shankar Thappa. “Development of Productivity Measurement Model With Special Reference to Tea Production in Assam”. International Journal of Management Studies (IJMS) 5, no. 2(2) (October 26, 2021): 91–98. Accessed June 20, 2025. https://researchersworld.com/index.php/ijms/article/view/1759.