The Princely States Report website has some neat color plates of Indian Army unforms from the 1930s and 1940s. They’re originally from a pack of 50 Players Cigarette Cards.
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.