Wimonwan Intarachernsiri และ Luepol Punnakanta. (2010) Utilization of common duckweed (Lemna Minor L.) and giant duckweed [Spirodela Polyrhiza (L.) Schleid.] as a bioindicator under hypereutrophic condition. Mahidol University:ม.ป.ท.Wimonwan Intarachernsiri และ Luepol Punnakanta. 2010. Utilization of common duckweed (Lemna Minor L.) and giant duckweed [Spirodela Polyrhiza (L.) Schleid.] as a bioindicator under hypereutrophic condition. ม.ป.ท.:Mahidol University;Wimonwan Intarachernsiri และ Luepol Punnakanta. Utilization of common duckweed (Lemna Minor L.) and giant duckweed [Spirodela Polyrhiza (L.) Schleid.] as a bioindicator under hypereutrophic condition. ม.ป.ท.:Mahidol University, 2010. Print.