Of course no one knows exactly what a dinosaur looked like, but Andrew Thompson will tell you how he painted a very nice looking one for his land that time forgot miniature wargame.
Mike Cooper has a web page with useful information on World War Two vehicle camouflage. IIt includes text descriptions, as well as a virtual “paint chip” gallery.
Les Uniformes de l’Armee Francaise contains a series of marvelous images that will work very well as a painting guide.
Duncan’s Colonial Modeling blog has a nice series of photos of British uniforms intended as a painting guide for the British in Zululand
The New York Public Library’s Digital Collection has plates of Polish uniforms from 1633 to 1787.