Authors include Tragastch, Bourdache, Peter Henshaw, Bob Currie, Roy Bacon and Ken Hallworth. See Bibliography
Magazines and journals include
The Motor Cycle, Motor Cycling, Classic Motorcycle and many others
Extensive information about the magazine collection at Classic Motorcycle Memorabilia
Motor Sports Magazine have archives dating back to the 1920s.
Jonathon Hayt of Arizona
Paul Markham of Australia, Eugene Smith of Arkansas
Byron Bay Motorcycles, Australia
Rick Zolla, Montanaman
Roger Henderson, Yorkshire
Todd Koehn, WI
Dave Morgan, Australia
Robert Livingstone, Argentina
Pekka Puoskari, Finland.
Bruno Erard, Belgium
See Collectors & Enthusiasts
Club Ydral, JLB-Creations, Cycle Memory, Chez Alice, Les Vieilles Chaînes Villefranchoises, Thierry Heurlin, François-Marie Dumas, Velosolex, Les Monet-Goyon & Koehler-Escoffier sur le Net...
Moto di Lombardia, Milan region.
Motoclubstoricoconti.it Italian marque information
Bill Irwin of thebikemuseum.com
Jon Bertelli: Maserati
Franco Bonadonna, Itom
Colin Jones, Itom
The GTU has a large database of German manufacturers.
Horst Mennig, Denia
DKW Motorrad Club
Virtuelles Kraftfahrzeug Museum Austria (voz.co.at)
Motorradveteranenclub Attnang Puchheim
raketsport.com has information on numerous models from the prodigious Scandinavian manufacturer Crescent.
The Moped Army has tomes of literature about the mighty moped.
Craig Howell of thecreeper.net
Monet Goyon, Maico and other images courtesy The Naked Maicomobil
Superia courtesy superiabromfietsen
Information on Swedish marques from an archive of www.konditori100.se, and also from bjorns-story.se
References are made to sites which no longer exist and may only be found by digging deep into the Wayback Machine, some of which have been archived on this site
Open Source information
Archivio dell’Enciclopedia italiana
Istituto per i beni artistici culturali e naturali
Wikipedia including Wikipedia NL
National Library of Australia - a treasure trove
Bibliothèque nationale de France
Detroit Public Library
IOM Museum (Not strictly open source - read FAQ)
Sheldon Aubut, the founder of this site.
Apologies to the many who as yet lack attribution.