History - 1974 Riddle, J. M. (1974). Theory and practice in medieval medicine. Viator Medieval and Renaissance Studies, 5, 157–184. https://doi.org/10.1484/j.viator.2.301620 Riddle, J. M. (1974). Dioscorides. In Dictionary of scientific biography, Volume 4A : Vol. (pp. 119–123). New York: Charles Schribner's Sons.