Ray, S. (1992). Technological development of agriculture in West Bengal since indepen- dence. Firma KLM.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRay, Siddheswar. Technological Development of Agriculture in West Bengal Since Indepen- Dence. Firma KLM, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRay, Siddheswar. Technological Development of Agriculture in West Bengal Since Indepen- Dence. Firma KLM, 1992.
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