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The three dialects of English, W. Labov a test for mixed rules, D. Sankoff and P. Rousseau the development of ME i in England - a study in dynamic dialectology, M. Ogura, W. S. -Y. Wang and L. L. Cavalli-Sforza the socio-politics of literacy - new methods in old English dialectology, T. Toon changing realizations of A in (a)tion in relation to the front a back a opposition in Quebec French, W. Kemp and M. Yaeger-Dror burnouts vs. rednecks- the effects of group membership on the phonemic system, T. Habick social polarization and the choice of linguistic variants, P. Eckert the impact of the Ozark drawl - its role in the shift of the diphthong /ey/, C. C. Mock ethnic boundaries in linguistic variation, R. Knack.
Mary L. Clayton (Wed,) studied this question.