University of Wisconsin libraries – digital collections:

From 1965–1970, Fieldworkers for the Dictionary of American Regional English (DARE) conducted interviews with nearly 3,000 “Informants” in 1,002 communities across America. They visited native residents in all fifty states and D.C., collecting local words, phrases, and pronunciations. In addition to answering more than 1,600 questions from the DARE Questionnaire, many of the Informants, along with auxiliary speakers, agreed to be recorded by the Fieldworkers. These recordings consisted of conversational interviews as well as readings of “The Story of Arthur the Rat” (devised to elicit the essential differences in pronunciation across the country). This fieldwork data provided invaluable regional information for the Dictionary of American Regional English Volumes I–VI (1985–2013) and Digital DARE.