The Harvard dialect survey. Vaux, B. & Golder, S. Harvard University, Cambridge, MA, 2003.
The Harvard dialect survey [link]Paper  bibtex   
@book{vaux_harvard_2003,
	address = {Cambridge, MA},
	title = {The {Harvard} dialect survey},
	url = {http://dialect.redlog.net/},
	urldate = {2016-09-29},
	publisher = {Harvard University},
	author = {Vaux, Bert and Golder, Scott},
	year = {2003}
}

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