Other
Aloha From Hawaii: The Ukulele
This resource presents a short article about the ukulele that explains how the instrument came to be identified with Hawaii.
Other
Kamaka Hawaii: Historic Kamaka Ukes 1916 1953 (Ukuleles)
Kamaka Hawaii, a Hawaii-based maker of ukuleles, publishes a photographic gallery of some of the company's older instruments, most made from koa, a large Hawaiian tree. A good resource for ukulele visuals.