Kenneth Rono, Julius O. Manyala, David Lusega, Josiah A. Sabwa, Edwine Yongo, Charles Ngugi, Kevin Fitzsimmons & Hillary Egna. “GROWTH PERFORMANCE OF SPINACH (SPINACIA OLERACEA)ON DIETS SUPPLEMENTED WITH IRON-AMINO ACID COMPLEX IN AN AQUAPONIC SYSTEM IN KENYA”. International Journal of Research Science and Management, vol. 5, no. 7, July 2018, pp. 117-2, http://ijrsm.com/index.php/journal-ijrsm/article/view/339.