Bibliography
Images
Images were found by searching on google.com with the keywords: plant pictures, hydroponics and hydro pics.
Text and Information
Mason, John. Commercial Hydroponics. Kangaroo Press. 1990.
Resch, Howard M. Phd. Hydroponics for Food Production. Woodbridge Press Publishing. 1997.
Southerland, Dr. Stern K. Hydroponics for Everyone. Highland House Publishing. 1986.