Wikipedia: Yurok language - Article including a phonological inventory and bibliography. - http://en.wikipedia.org/wiki/Yurok_language
Ethnologue: Yurok - Basic demographic and linguistic information. - http://www.ethnologue.com/show_language.asp?code=yur
Yurok Language and the Yurok Indian Tribe - Pronunciation guide, language learning worksheets, and cultural information. - http://www.native-languages.org/yurok.htm