Orton, Harold and Dieth, Eugen (eds.) 1962-1971. Survey of English Dialects. The Basic Material. Leeds: E.J. Arnold for the University of Leeds.
http://sounds.bl.uk/Accents-and-dialects/Survey-of-English-dialects
@book{orton19621971, address = {Leeds}, editor = {Orton, Harold and Dieth, Eugen}, publisher = {E.J. Arnold for the University of Leeds}, title = {Survey of English Dialects. The Basic Material}, url = {http://sounds.bl.uk/Accents-and-dialects/Survey-of-English-dialects}, year = {1962-1971} }