Remember this is way before the days of web search engines. This is where I start almost all my web searching for anime materials. If I don't find it here and then locate it elsewhere, I submit the URL to the Turnpike. He has a database which can be searched by a variety of criteria. Search results include not only roles as voice actors, but also musical recordings and regular acting roles.
Membership is free and the members get a nice color membership card.
Anyone who has more than a passing interest in manga owns Fred's two books on the subject, Manga Manga and Dreamland Japan as well as several manga he has translated. In fact, if you are a long term anime fan you probably own his translation of the Gundam novels that Del Rey put out in 1990. His web pages are a major resource for this genre of manga and anime. This massive and well organized web site is devoted to the production of one studio. Studio Ghibli is internationally famous for its high quality and very successful animations.