Environmental studies of constructed wetlands in Akumal, Mexico: new comparisons of geotechnical and botanical parameters. Tesis de maestría VARMA, S. (2010): Environmental studies of constructed wetlands in Akumal, Mexico: new comparisons of geotechnical and botanical parameters. Tesis de maestría. Fairfax, Virginia (USA): Universidad George Mason. URL [Accessed: 26.09.2018] PDF