SINGH, K M, NASIM AHMAD, D K SINHA, ABHAY KUMAR, and R K P SINGH. “Cost Efficiency of Principal Crops in Bihar (India) – A Stochastic Frontier Approach”. The Indian Journal of Agricultural Sciences 90, no. 8 (October 14, 2020): 1445–1452. Accessed September 1, 2024. https://epubs.icar.org.in/index.php/IJAgS/article/view/105940.