Sito Ufficiale Moto di Lombardia has an informative catalogue of Italian motorcycles produced in the Milan region.
Motoclubstoricoconti.it Repository of Italian marque information
Amici delle Moto-Bici Sottocanna (AMBS)
Detailed historical and technical articles on veteran and vintage machines.
amicidellemotobicisottocanna
Biblioteca Salaborsa
Bill Irwin of TheBikeMuseum.com has kindly loaned images of Magni, MV Agusta and other marques.
Franco Bonadonna, historical information on the Itom, with images.
Colin Jones, Itom images and information (formerly at web.onetel.com)
Aprilia Australia supplied a number of factory images of earlier Aprilia motorcycles.
Special Mention
Hessink's Veilingen supplied images and information on a number Italian lightweight sports machines.
Italian translations (word only, not phrase)
by Oxford University
en.bab.la/dictionary