Documentum de modo et arte dictandi et versificandi = : (Instruction in the method and art of speaking and versifying) / Geoffrey of Vinsauf ; translated from the Latin with an introduction by Roger P. Parr .. - Geoffrey di Vinsauf, m. c. 1210-1213. (OLS)http://pul/name/51497; Parr, Roger P. (OLS)http://pul/name/51498 (Marquette University Press, 1968)