Viyada Seehabutr. (1992) Study on the structure and function of neuroendocrine organs in giant Afrigan snail, Achatina fulica. Mahidol University,:ม.ป.ท.Viyada Seehabutr. 1992. Study on the structure and function of neuroendocrine organs in giant Afrigan snail, Achatina fulica. ม.ป.ท.:Mahidol University,;Viyada Seehabutr. Study on the structure and function of neuroendocrine organs in giant Afrigan snail, Achatina fulica. ม.ป.ท.:Mahidol University, 1992. Print.