Grammatical categories of the verb in African-American Vernacular English. Dayton, E. Ph.D. Thesis, University of Pennsylvania, January, 1996.
Grammatical categories of the verb in African-American Vernacular English [link]Paper  bibtex   
@phdthesis{dayton_grammatical_1996,
	title = {Grammatical categories of the verb in {African}-{American} {Vernacular} {English}},
	url = {http://repository.upenn.edu/dissertations/AAI9712915},
	school = {University of Pennsylvania},
	author = {Dayton, Elizabeth},
	month = jan,
	year = {1996},
	keywords = {Perfective done},
}
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