Crow Language and the Crow Indian Tribe - Pronunciation guide, language learning worksheets, and cultural information. - http://www.native-languages.org/crow.htm
Ethnologue: Crow - Basic demographic and linguistic information. - http://www.ethnologue.com/show_language.asp?code=cro
Wikipedia: Crow language - Brief article about the Crow language and its speakers. - http://en.wikipedia.org/wiki/Crow_language