ROWE, RYAN DAVID. The Development of African American English in the Oldest Black Town in America: Plural –s Absence in Princeville, North Carolina. (Under the direction of Walt Wolfram, William C. Friday Distinguished Professor)
https://repository.lib.ncsu.edu/bitstream/handle/1840.16/711/etd.pdf?sequence=1&isAllowed=y
Wyllie, Elizabeth
2012 Defining Eastern North Carolina Upriver Steamboats Through Tar River Archaeology and History, Master’s Thesis, Department of History, East Carolina University, Greenville, NC.
https://search.proquest.com/docview/1017545683?pq-origsite=summon