We have information from several sources:
Handbook of Energy CropsJames A. Duke. 1983. unpublished.
Evaluation of Tropical Leaf Vegetables in the Virgin IslandsManuel C. Palada and Stafford M.A. Crossman
Magness, J.R., G.M. Markle, C.C. Compton. 1971. Food and feed crops of the United States.
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Last modified: March 11 2013 by aw