Peran eceng gondok (eichhornia crassipes) sebagai biofilter dan fitoremediasi terhadap logam cu, cd, pb, dan zn dalam rangka restorasi situ = Role of water hyacinth (eichhornia crassipes) as a biofilter and phytoremediation for metal cu, cd, pb and zn for aiding the restoration of lake / Astri Ratnasari - Astri Ratnasari, author (2016)