Islam, QMS, and MA Matin. “Profitability Level of Betel Leaf (Piper Betel L.) Cultivation in Some Selected Sites of Bangladesh”. Bangladesh Journal of Agricultural Research 42, no. 2 (June 7, 2017): 343–351. Accessed July 3, 2024. https://banglajol.info/index.php/BJAR/article/view/32819.