Xingjian Xu, Xianxiang Yang, Chuanhua Yu, Wei Zhang, Qingsang Pan, and Zhengan Xiong. “Experimental Measurement of Specific Gravity of Oncomelania Hupensis and Its Eggs”. Agriculture and Natural Resources 28, no. 3 (September 30, 1994): 471–475. Accessed May 7, 2024. https://li01.tci-thaijo.org/index.php/anres/article/view/241435.