@article{poplack_variability_2002,
	title = {Variability in invariant grammars: {The} {Ottawa} grammar resource on early variability in {English}},
	volume = {8},
	url = {https://repository.upenn.edu/pwpl/vol8/iss3/17/},
	number = {3},
	journal = {University of Pennsylvania Working Papers in Linguistics},
	author = {Poplack, Shana and Van Herk, Gerard and Harvie, Dawn},
	year = {2002},
	keywords = {Early African American English},
	pages = {Article 17},
}

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