1. Standard Methods for the Examination of Water and Wastewater;American Public Health Association,1971
2. Aquatic weeds — eradicate or cultivate?;Bates;Econ. Bot.,1976
3. Wolffia arrhiza as a possible source of inexpensive protein;Bhanthumnavin;Nature (London),1971
4. Use of duckweed for waste treatment and animal feed;Culley;J. Water Pollut. Control Fed.,1973
5. Making Aquatic Weeds Useful;Culley,1976