Lawson 'Bicyclette', 1879 | Science Museum Group Collection
1860-1880 - exposition virtuelle
1879 : la bicyclette de Lawson - Photos Futura
L'évolution de la bicyclette - Playhooky
Fichier:Lawson Safety bicycle.jpg — Wikipédia
Bicyclette [by Englishman Henry Lawson the first back wheel chain drive bicycle ] 1880 From Wheels and Wheeling; An indispensable handbook for cyclists, with over two hundred illustrations by Porter, Luther Henry.