Ball, 1903. Farmer's Bulletin, No 168 Document reference Ball, C. R., 1903. Pearl millet. Farmer's Bulletin, No 168Web http://books.google.fr/books?id=oaqsDg5pm2sC&printsec=frontcoverCitation key Ball, 1903Datasheets Pearl millet (Pennisetum glaucum), forage
