↑"Boves, iumenta, et instrumentum rusticum": Phaedrus, Fabulae 4.4. "Instrumentum rusticum omne in forum attulit ... ferramenta egregie facta, graves ligones, vomeres ponderosos ...": Plinius, Naturalis historia 18.41-43
Bibliographia
K. D. White, Farm Equipment of the Roman World. Cantabrigiae: Cambridge University Press, 1975