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}
}