1. Plutarch's Lives, II, Chap. XXV, 155. Eng. Trans. by Bernadotte Perin. New York, Macmillan (1914).
2. COLUMELLA, De Re Rustica, IX, Chap. VI. Trans. Columella of Husbandry by A. Miller. London (1745).
3. VIRGIL'S WorksThe Aeneid, Eclogues, Georgics. Eng. Trans. by J. W. Mackail. New York, Random House (1950).