Epistolario di Ernesto Codignola conservato nel Centro di Studi pedagogici "Ernesto e Annamaria Codignola" di Firenze.

Como, Red Ed. 1989m, cm.12,5x19, pp.123, ill.bn.nt. brossura con copertina figurata a colori.

Montevarchi,Accad.Valdarnese del Poggio,20/11/1998. Firenze, Accademia Valdarnese del Poggio/ Studio Edit.Fiorentino 2000, cm.17x24, pp.179+74, brossura con sopracop.fig.

Leicester, Silverdale Books 2002, cm.23,5x31,5, pp.174, ill. col. harcover, dustjacket. After the first tractors appeared on the scene in the late 1890s, it took another two decades and plenty of modifications for farmers to embrace this once-crude technology in favor of the steam engine, further advancing the power-farming revolution. Written by an international expert in agricultural machinery, Farm Tractors takes readers back to the nineteenth century to look at the precursors to modern tractors and travels through the years to follow the machine's evolution as tractors became indispensable equipment on farms across America. Inside:-How steam-powered machinery gave way to tractors, and how tractors changed the way that farmers worked.

Germania, Schott Ed. s.d. cm.23x31, pp.8+8+3, fascicolo spillato e fogli sciolti.