Atlasgeo: The Netherlands: Animated GIF image.
Dutch Flag and Coat of Arms: History, heraldic description, and flag days, from the Ministry of Foreign Affairs.
Flags of the World: The Netherlands: National, subnational, historical, governmental, and military flags.
Theodora.com: Flag of the Netherlands: Images in several sizes.
Theodora.com: Friesland Flag: Images in several sizes.
World Flag Database: Netherlands: National and province flags and country facts.