...Marinoni in abbreviated form in his comments are only two, as follows: Becfc = Theodor Beck (1906) Leonardo da Vinci (1452-1519). Vierte Abhandlung:...Zeitschrift des Vereines deutscher Ingenieure, L, pp 524-531, 562-569, 645-651, 777-784 Clark-Pedretti = Clark, Kenneth and Pedretti, Carlo ( 1 968/...