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Krug, Manfred, Schluter, Julia. (2014). Research methods in language variation and change . Cambridge: Cambridge University Press.

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Krug, Manfred, Schluter, Julia. Research methods in language variation and change. Cambridge: Cambridge University Press, 2014. Text.

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Krug, Manfred, Schluter, Julia. Research methods in language variation and change. Cambridge: Cambridge University Press, 2014. Text.

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Krug, Manfred, Schluter, Julia. Research methods in language variation and change. Cambridge: Cambridge University Press, 2014. Print.