Iqbal, 1999. EAWAG, SANDEC Report No. 6/99 Document reference Iqbal, S., 1999. Duckweed aquaculture potentials: Possibilities and limitations for combined wastewater treatment and animal feed production in developing countries. EAWAG, SANDEC Report No. 6/99Web http://www.eawag.ch/forschung/sandec/publikationen/wra/dl/duckweed.pdfCitation key Iqbal, 1999Datasheets Duckweed